I just visited a site called Bid4prizes.com and I think you might really like it. All you have to do to play and possibly win Free gifts is to register on the site and start making bids on items that you would like to win.
They have lowest unique bid Sweepstake where the person who has the lowest bid for the item wins that prize. At this time they have a Scion XB vehicle and a 61″ HDTV set up for lowest bid auction.
The site looks fun and easy to use. It’s text based. You can enter bids for the various auctions using your mobile phone or by visiting the website. It’s easy. Why don’t you visit the site today. Perhaps you’ll be lucky and win a Cash prize, HDTV, Apple iPhone, the Scion, or even a designer bag. There’s a new winner each day. Check it out.
I also have a site very similar as your recommended, but it now only open to Aussies, it uses SMS to place bids. it’s fun and they gives you a bid history shows what bids have been placed. the address is: http://www.biddingthumb.com. if you are in australia, you might want to try.