Yeah, we all kind of assumed it, but here's 'confirmation'. You guys have probably figured out by now that I'm a Star Trek fan, and I was part of a Kickstarter campaign to restore the Next Generation Enterprise Bridge. The Facebook page for this campaign has all kinds of pictures of various people supporting their cause. This was just posted recently.

(In case you're wondering, the joke is that the back of the shirt says, 'Shut up Wesley!', so wearing it while appearing with Wil Wheaton... well, you get the idea.)
And if you're into Big Bang Theory, this also implies that the nameless girl who might be interested in Raj could become a recurring character, if they're already planning on bringing her to Comic Con.
ETA: I just figured out that this actress is also on Geek & Sundry, which is why she'll be on a panel with Wil Wheaton. Duh!!!!