Despite the economy being in a tailspin there is a lot happening with smartphones right now. The G1 Android is just one exciting development. I could have gone in many directions or waited but chose the G1 because I like the hardware and wanted to get into the software from the beginning. There will be more choices in a few months but I didn't see any reason to wait.
What are you looking for in a smartphone? Are you already on T-Mobile or thinking of moving to it? What other phones appeal to you?