Some bad news, though there's still hope:

"posted on 2006-05-24 02:23:00
source: Moon Phase
No Genshiken Season 2


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While initial reports from Comiket were that there would be a second season of Genshiken, Moonphase now reports that the project is actually a new, independant Kujibiki Unbalance TV series and a serialised manga.

Monthly Afternoon Magazine, where Genshiken was serialised, has not yet made any announcement regarding the Kujian manga on their website.

Thanks to Aryaan for this item."

http://animenewsnetwork.com/article.php?id=8923