I bought one of these: http://cgi.ebay.com/ws/eBayISAPI.dll...m=290386256129
And I received it today. It's in two "pieces" so sliding out the keyboard is no problem. You also have access to all buttons(even including the stand). The piece for the screen feels like it will slip off any minute even though I know it wont, and also you can see some edges where it's molded togheter, but otherwise it's a great purchase. And for the price, there's nothing to talk about, really. It even protects the Nokia logo on the front. I will also buy a Invisible Shield screen protector, then my N900 should be completely safe, I hope

If you want some pictures, just tell me and I'll take some, since the photo on the eBay don't even show how it looks with the cover on the phone.

EDIT: It even came with a screen protector that look like the one in this post: http://talk.maemo.org/showpost.php?p=496892&postcount=1