This past week, I decided to take the plunge and buy another G1 to root and play with. After taking it home and carefully following the instructions I had a fully root'ed G1 with WiFi tethering that turns it into a wireless hotspot and an IPSEC VPN client.
The latter is what truly turned it to an enterprise phone along with the new Work E-mail app that gives Android native Exchange capabilities. Well after making short work of that G1 it was quickly sold to a friend of mine who is a TMO fan and just happened to need a new phone the next day. So being armed with my new knowledge of jailbroken G1's, I promptly bought a new white one from my local T-Mobile retail store.
Now it's fully rooted and I can now use it to its full potential. Android is quickly proving itself among the large WSP's that it is a force with which to be recokened. It will soon be pervasive on high-end and low-end handsets alike on ATT, Verizon, TMO, Sprint, and Verizon. While iPhone is going gangbusters at just one provider it is just a proprietary phone, not a software platform. After Moto releases their version the market should be flush with even more HTC's not to mention Samsung and LG variants.
To me personally, the mobile space is shaping up to be most interesting place for high technology and looks to continue to be the hotbed for new ideas.