Thanks for the suggestions.
I really like the look of the Chinao case except they're really expensive to get sent to the UK.
The Cyber Acoustics Leather Portfolio also looks good, at first I wondered about the exposed sides but I don't think it's a big deal. Unfortunately they don't ship outside the US.
I read the thread on the Macally Bookstand and early discussions were very enthusiastic but later lots of reports of quality issues and fraudulent credit card charges which has put me off that one.
I'm a little confused by the various revisions of the Yoobao. I'm a bit put off by the fact it only seems to be available on ebay (like the Chinao). Also the version that comes up mostly seems to have too much of the screen edges covered. I recently had issues with the SwitchEasy Colors case on my iPhone being too close to the screen edge, so that it interfered with using the touch screen. I definitely prefer the fact that others (like the Apple design) keep the case well away from the touch screen area. Having the corners so exposed doesn't make sense either.
I found a few myself that look promising. The Marware Eco-Vue looks good. I'm not impressed with the flap that 'holds' the iPad in, though reviews seem to infer it's not a big deal. The bit of elastic to hold the cover shut looks a bit pathetic too. It looks like it encroaches too much on the touch screen.
The XGear Folio also seems like a good case. Quite expensive, but one comment that it fits in the Belkin neoprene case (which I have) sounds good for extra protection when travelling.
Any others?