Negative. There is no native MMS just yet, but it is coming.
You can download and use fMMS right now. It's still in development, but very usable.
...working to port Android onto the N900. Honestly I would not be surprised if someone found a way to load OSX onto this device,
Why replace Maemo -
the most powerful friggin' mobile OS on the planet - with an inferior OS, especially Android. Why? So we can have fart apps? It's counter-productive to waste time and effort on this.
The apps for Maemo will come. Anyone remember what was available for the iPhone or G1 when they were released? If so, you know Maemo, both in terms of the OS itself and apps for it, is already far,
far ahead of where they were 2 months after introduction.
Nokia is an absolute monster in the phone business. They have
the killer OS and the resources to make things happen with Maemo. And they know that they have to compete, so the motivation is there. A little patience with Maemo will pay big rewards in 6-12 months.