I am not a developer, just an avid user, so I can’t talk from hands-on experience with developing software for mobile platforms, but found this very interesting article that compared several areas of these two Linux-based operating system. It was encouraging to hear that Nokia has kept Maemo fairly open and appears to offer more for the developer. Google Android devices are HOT right now with devices like the Motorola DROID and HTC Hero, but I hope that this type of excitement is generated for the N900 and Maemo. It is a tougher sell in the US where the N900 will cost you $550+, but if T-Mobile can offer this subsidized for half that price then we may see more enthusiasm.
The Nokia N900 is an awesome device that I find myself using more and more as I spend more time with it and I can’t wait for my own personal device to get here in November.