I tried the apple case, but the main problems for me is that it picked up dust and marks too easily, it wasn't comfortable to hold all the time and the design is such that it is a pain to keep removing your ipad too often so for a while I went back to a Belkin one I initially bought at the same time as the ipad due to shortages of the official case.
The other week I bought a Tuff-Luv multi-view case from the same people that made the case I am using on my ebook reader, it is quite pricey and a tad bulky, but for me it looks better than the official one, has more options for using it as a stand than the official one and is much easier to remove the ipad from the case if I don't want to use one at all. There is another model that also allows you to stand it up in portrait mode, but to be honest I just couldn't think of a time when I would use that since I only use the stand when it is playing videos and hold it myself when doing anything in portrait mode.
Belkin case -
http://www.belkin.com/IWCatProductPa...duct_Id=509026
Tuff-Luv multi-view -
http://www.i-nique.com/detail.asp/cn...=5055205270876