I am a G1/Wing owner. I got my G1 2 days ago and i can tell you, i am very happy with the phone so far. I do miss using TTran's OPT and hope they port TouchFlo2D to Android. The Manilla Theme is the best i've seen!
I am also one of those people that would much rather run Linux on my PCs at home, but don't because i am in the IT field so i need to stay current on Windows. Anyhow, I understand people wanting to wait and recommend most do that. I am not usually the type to jump on a product at Version 1 until some updates and public testing has been done. But i am looking forward to Android's growing pains!