Just another shout out for Martin Fields... I've had them on my past 4 or 5 phones and they're great. Customer service is good too.

I emailed them and asked when the N900 one would be out and they said they were waiting for a device to use as a template. If I get my N900 before MF has them I might just have to order them from somewhere else...

Edit: The one thing I dislike about MF is that all their stuff gets shipped from Singapore or Hong Kong. I've never used Best Skins Ever but on their site I saw:

All of our Skins are designed and produced in the USA, right here in Colorful Colorado.

I too am here in "colorful Colorado" so I might just give them a try this time!