thelushlife you summed-up the state of the mobile platforms pretty damn well!

The only thing I can suggest really is wait a little bit longer before you make your decision.

Maemo: At this moment in time I am not impressed by Nokia's public support for this platform. It is highly unlikely OVI maps (with free navigation) will be avialable for the n900. Nokia are focusing on Maemo 6 - which will be launched with a new device. "New" OVI maps will be available on Maemo 6 only.
If my n900 becomes a "legacy" device after a few months after release then I will not be buying a Nokia phone again!


iPhone: Apple are the "king of apps" but unfortunately the iPhone OS is really limiting. As a consumer device it's almost perfect.
Apple's iron-fist control of the iphone really bothers me though.

Android: I think this is a great OS and with more powerful phones now using it.
My only problem is that Google know everything about you. Your privacy does not exist with Google-based software.

Winmo: Microsoft's current offering is truly awful and needs a replacement. It started well at the beginning but just seemed to degenerate with each release.
Microsoft have been eerily quiet recently. Something major is definitley on the cards.

If navigation is important to you then do not buy the n900. We still do not know if the free version of OVI maps will be supported.
A future maemo device will be. If Nokia will allow us to upgrade the n900 to Maemo 6 then the n900 (or next device) is highly recommended.

If I had to choose right now - I would go for Android. It's open-source like Maemo but much more publically supported by Google and it's partners. If you don't mind google using your personal data within it's organisation. A friend of mine bought the HTC Hero (Android v1.5) and the next version of Android (2.01) is available for it.

If you are willing to wait until Microsoft release the "next-generation" of the mobile OS - you might be pleasantly surprised. Yes it proprietary - but that did not stop people writing software for it.