Whew...you just schooled me. LOL! I have a slower learning curve when it comes to this stuff...especially since I've had an android phone about a grand total of a week now.
Long story short, found a friend that is an Android nut and spends his time rooting phones for all his friends for the price of a pack of sigs. In a nutshell, it did have 2.1, but was missing some things. It did access the internet but couldn't assess any part of the market. He kinda explained to me the reason it didn't work but most of his info kinda went right over my head. After all, I've been using a Behold for the better part of two years (as you stated, purchased in Nov '08). lol!
To answer your question about my data plan, I already had an unlimited web plan and all Tmobile had to do was switch it from a smart phone to a PDA in their system...or at least that's what they said. They said the G3 is considered a PDA and they switched everything over seamlessly over the phone and it didn't cost me anything. It took all of a min or two.
As for the ROM information, no idea. It's gone now so I can't even look back at that info. I had the guy wipe it back to 1.5 and then the automatic 1.6 upgrade from Tmobile's network came on its own just a few hrs later. So, now it's currently running just fine on 1.6.
We ran out of time and had to leave it this way, but next week when I go to see him he's gonna put 2.2 on it for me and clock it to be a little faster. He has a MT3G currently running on 2.2 and says he can switch mine in 30-40 min no problem. That's probably the route I'm gonna go. He said it'll be setup so that it can easily be set back to 1.6 when the time comes to sell it. He has a process for all this stuff which again, is kinda over my head.
As for the upgrade to the G2, that'll more than likely happen. The MyTouch was a "get me by for awhile" phone, purchased on craigslist. Tmobile already bumped my upgrade to anytime I want. I told them about my Prem Tech job for AT&T and how I might as well utilize my company discount so they moved to upgrade date to immediately and gave me free mobile to mobile minutes. Now that's customer service! As of now it's just a waiting game for the G2 or something better to come along. Any idea when the G2 is gonna be released? Tmobile won't give me a strait answer.
Thanks so much for the input...all great stuff! Unfortunately I don't trust myself to do this rooting stuff alone and was just lucky enough that I have a friend that's fully capable of all this Android stuff. I no longer own a $125 paperweight.