Actually, a lot of these look lovingly homemade. Aw, geeks, you make the bestest cakes! (This is the year-round version of geek pumpkins.)
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.