By way of the dot-anime (which unfortunately lacks the site feed):

I got an update from GAINAX production manager Saito-san about their staff coming to Fanime.

Apparently they're sending 46 people this year.

A good number of them are Gurren Lagann staff. Almost all of the Gurren Lagann staff are in their 20s, and GAINAX board director Takeda-san wanted the young staff to expand their creative vision by seeing the world. So thus the field trip to San Jose, CA.

I hope they like it. I've been to Fanime before, it's not bad.