Well maybe not perfect but very hard to beat for the price. The case is made by "Nite Ize". I've used their stuff for years and always been satisfied. They make a horizontal carry pouch held shut with velcro. It has a sturdy belt hook with the extra lip on the clip so it does not slip off your belt unless you want it to. The N900 fits well, could be just slightly snugger.

$10 at my local Fry's, brand new.

First post since getting my N900. It's good to be back to Maemo, I smashed my N810 in my motorcycle accident last year.