My Ebay account was recently hijacked too. Bunch of sunglasses 'auctions' were posted, but Ebay locked my account before I knew anything about it, and I've since restored access to everything, changed passwords etc. None of my account information was changed though.
To all those wondering, I never log into email, ebay or anything like that from public computers. Only other place I log in is at friends computers, which I'm guessing is what caused the problem, either that or Auction Sniper (how I 'won' the last auction).
I'm not really worried about it. If anything, they might try to purchase something with my Paypal account thats associated with closed bank account and a low limit credit card...