Geek-branded clothing is one fashion trend that hasn't lost any momentum as far as I'm concerned. Faux vintage shirts with either fake companies or classic video game references on them have been a hit with young people for a few years now. In a market that's hard to stay constantly fresh, the Tony Garcia t-shirts do pretty well.
Rather than featuring just the logo or name of a video game or movie, the Tony Garcia t-shirts display clever little situations in which iconic pop culture characters are presented. I particularly like the one with the Gingerbread Man from Shrek.