It’s time for We Are Social’s Monday Mashup, a quick round up of research, news and case studies that caught our eye over the last week and we thought were worth sharing. Here’s our pick of some of the web’s finest.

Crowdsourcing advertising – can it work?
A fine post by Amelia Torode about Peperami’s decision to crowdsource their latest interactive advertising campaign. It calls into question the monetary reward being offered, the inadvertent creative role that Idea Bounty has taken in vetting a manageable number of ideas for the client to chose from, and the implications for agencies:

Maybe it just troubles me as the logical conclusion of an initiative like this is that you don’t need agencies anymore, you simply crowdsource the creative ideas cheaply and then partner with production houses.

The post kicked off a lengthy discussion in the comments section, so get a cup of tea and start scrolling. It’s worth the read.

Trouble At Twitter: U.S. Visitors Down 8 Percent In October
Twitter’s explosive growth of 1271% from October 08 – October 09 was bound to slow down eventually, but recent numbers from comScore have demonstrated that last month “the number of people who visited Twitter.com from the U.S. actually declined for the first time by 8 percent month-over-month”.

Twitter has been working furiously to make its website better by rolling out the new Retweet button, Lists, and Geolocation features. As Twitter loses ground in its home market (and Facebook keeps moving ‘further and further ahead’) the question is whether the new changes will be enough to reverse this downward trend?

LinkedIn works with Twitter, and vice versa
Last week LinkedIn and Twitter announced a partnership that allows your LinkedIn status to show up as a tweet when you set it, or for a tweet to also appear as your LinkedIn status.  The rationale? “Because when you’re trying to get something done, you want Twitter and LinkedIn to work together”.

In effect, the move is meant to save you time while you promote your professional identity across the web and cut out having to login on multiple platforms to share the same status/message.  And crucially, you can be selective about what appears in your LinkedIn profile i.e. you can set LinkedIn so that all your tweets appear, or only those with the hashtag #in.

SideWiki changes everything
If you haven’t been keeping up with Google’s SideWiki innovation, this post is a good place to start. PR guru Mark Borkowski considers the impact that SideWiki will have on reputation management and PR on the web.

Few people in PR, it seems, have considered the way that SideWiki will change the lives of beleaguered PR folk. In time, this tool will significantly change the way brands strategise, think and exist. SideWiki is going to challenge PR by providing the masses with the tool for the ultimate expression of people power, something uncontainable that will need constant monitoring.

A sweeping statement? Yes, but read on.

Did CoTweet just take Twitter’s business model, and future customers?
Twitter’s usefulness and exceptional growth are as legendary as its lack of revenue stream and business model. The key question here: “what happens if Twitter takes too long and third parties take over the market?”

CoTweet might be doing just that, and the startup has recently launched a paid for service to allow clients to “reach and engage customers using Twitter.” Econsultancy examines the diminishing market opportunity for Twitter, as 3rd parties like CoTweet develop direct commercial relationships with brands and advanced tools for them to manage their relationships online.

People open to marketing in social media
This is reassuring news for those who, say, work for social media agencies.

Performics conducted a survey of more than 3,000 U.S. consumers, which “comprised 100+ questions to determine how various segments of consumers use social networks in their daily lives, specifically in regard to finding out about different types of products and in relation to other media channels”.

The study found an immense opportunity for gaining customers and growing sales so long as marketers “communicate relevant messages in consumers’ language and on their terms”.

The Connected Brands Index
Last week iCrossing introduced the Connected Brands Index, some research out of the US designed to measure a brand’s effectiveness online “not just on their own properties, but also across search and social media”.

According to iCrossing, a successful online brand is made up of five key attributes – visibility, usefulness, usability, desirability, and engagement – which can be measured by looking at 65 different metrics.

This research does not tell you what the most connected brands on the web are, but looks at the top 10 global brands according to the Interbrand study and should serve as future reference for benchmarking. Download the full research here.

Earlier in the week, comScore released their latest figures on European social network usage, which Neville then kindly graphed in Excel for us all:

Graph showing percentage of each country’s internet population using social networks

A pretty astounding chart that shows social media’s impact isn’t limited just to the US and the UK. comScore also released data for the Asia Pacific region on the same day – anyone fancy combining the 2 sets of data into one chart?

Update: Matt Wardman has created a single chart…