Wikipedia:Spotlight [1] is an inactive project that many of you are probably familiar with. The concept is, real-time collaboration on building a specific article.
When it worked well, Spotlight was a great project; it gave participants a taste of the best of Wikipedia and the feeling of community and common purpose. Relative newcomers could learn from old hands, and with many people pitching in, major articles could see huge improvements in a short time. The downside is that it was hard to keep momentum up, and most of the time there was simply nothing happening.
Some of the Wikipedia Ambassador Program participants are trying to revive the best parts of Spotlight with Editing Fridays [2]. Instead of one collaboration after another, we set a specific time to collaborate: late Friday to early Saturday UTC. Please join us this Friday!
-Sage
[1] = http://en.wikipedia.org/wiki/Wikipedia:Spotlight [2] = http://en.wikipedia.org/wiki/Wikipedia:Ambassadors/Editing_Fridays