Wow. Just, wow. I've had mine for, lets see, a month and a half now; not a single crash or error yet (even with uptime stretching into weeks between rebooting). Browsing these boards, I haven't seen other users dealing with anything like the problem you're describing here. Maybe you need to have your n900 serviced?

This thing is running Linux -- if you think an operating system that is, now, two decades old and running on everything from embedded cpus to desktop machines to supercomputers is still a "badly written beta", I'm afraid you're going to be underwhelmed by the competitors. (Windows Phone 7 is less than a year old, iOS is only four, Symbian at best has a history of about a decade, and Android is, of course, running exactly the same "badly written beta OS" as the n900 does.)

Honestly, there's gotta be a reason for your n900 to be crashing when so many others are working perfectly fine. You really should take it to be fixed...