Summary of online activity~
Megumi Nakajima's blog post
Suga Shikao's blog post
Jun Fukuyama's blog post
Sakura Tange's blog post
Check out @clampnews's tweets for a timeline of some of the nico video and retweets from other fans. It might be worth it to note that 'CLAMPフェス' was a trending topic in Japan during the event. :)
There are also a couple fan blogs that have comprehensive summaries of the main events--kntkiwa, underhell, heysari.
And for those who were wanting goods from the Festival, they've already been posted on Yahoo Japan Auctions