I had been looking for an iPad case similar to the Incase Slider that I had for the iPhone 3G and found the Casecrown Polycarbonate Glider. I just received it yesterday and really like it. It looks and feels very similar to the Slider. Fit and finish are nice. I like the lip on the screen edge so you can lay it on the table without having to mess with a front flap. I had read other posts looking for a similar case and thought I would share. Got it on eBay for $19. Here is a link to the case on Casecrown's site where it is $28.
LINK
LINK