Twitter is great, but there usually comes a time when phenomena like it jump the proverbial shark. The fact that these T-shirts from ThinkGeek exist could mean Twitter is approaching that point, but I do kind of want one anyway.
The brown and blue shirt essentially turns you into the Twitter "anonymous" icon, or the default Twitter profile image for people who haven't uploaded their own pic (I use my CNET headshot, natch!).
The icon's pictured to the left, but for those who don't know it, it's o_O. Just like that. It's an emoticon, really, that resembles a surprised gerbil.
The shirt sells from $15.99 to $17.99, depending on size, which I feel is blatant discrimination. I'll check ThinkGeek's Twitter feed for an apology.