This month's Newtype USA includes a demo DVD including the first
episode of "COMIC PARTY" (along with Azumanga Daioh).

Jessica can be heard as the green-haired girl (sorry, can't remember
her name) who calls one of the leads a "stupid panda" (and it was
the "laugh" that was how I confirmed to myself that it was Jessica).

I've seen this girl featured in lots of promotional images, so I
have reason to believe she will be a supporting role, reappearing
through out this 4-disc release (DVD 1 is now available).

Great, funny show also, by the way.