Short answer: Yes. But it's not that simple. All electronics are outdated by the time you open the box... there's always something newer and faster and more shiny coming out next week.

While I have owned N900 since last year and love it and can't imagine using anything else, based on your concerns I would suggest you hold off at least until the MeeGo phone is announced and official specifications are available. My "gut feeling" (based on nothing) is that first generation MeeGo phone will be very similar to N900 in hardware. We won't know for sure until it is announced, though. Maybe they will "wow" us with a real game-changing device.

On the other hand, N900 stock is being cleared out and prices being slashed. If money is a factor in your decision, you can get an extremely good deal on N900 nowdays. Nokia USA had it for USD$199 with an old-phone trade-in. That's 1/3rd of the price it was 6 months ago.

In the short term, buying the "mature" N900 may give you more than with the MeeGo phone. I say this because N900 has almost a year of community effort and software development put into it. MeeGo will be starting from scratch with both community and commercial software. Surely some of the Maemo software will be easily ported to MeeGo but whether everyone does that or not will not be known until that day comes.

There's also the fact that MeeGo-on-N900 is alive and real, you can install it on your N900 today. I have high expectations that we'll someday see a consumer-quality Meego release for N900 and those of us who wish to use Meego rather than Maemo as our everyday OS on N900 will be able to. Hopefully, if MeeGo-phone's hardware is not radically different from N900, we'll be able to take advantage of new features and software developed for MeeGo on our N900s.

There's also NITDroid which installs Android in your N900, and you can dual-boot between Maemo and Android. I would never want to use a primarily Android-based phone (or I would have gotten one), but having it there for apps or whatever that can't be done on Maemo is of course a welcome option.

I'm personally going to hold on to my N900 and watch MeeGo with interest. Probably wait for 2nd-generation MeeGo phone to ditch my N900, depending on how things progress and what direction Intel and Nokia try to take it. I'm skeptical but hopeful.

As a linux user for many years, N900 is simply the ultimate phone. The power and joy of having a real linux distro in my pocket at all times is great. No other phone even comes close, in my opinion. You can have my N900 when you pry it from my cold, dead hands.