As an Android phone the T-Mobile G1 promises to be the most open telephone platform in the United States, perhaps with the exception of the OpenMoko phone I've read about. But as a phone backed by a major cell carrier the G1 has a chance to have a noticeable effect on the mobile data space. Based on Engadget's coverage of the launch here are my impressions broken down as a brief set of pro's and con's.
I'll go with the good news first, then the not-so-good news.
+/- $179 2-year-contract G1.
+ $399 contract-free G1
+ Tethering allowed, but monitored.
+ Amazon music store integration.
+/- Data plans had 1GB limit, under review.
- Data plans are a bit much: $25 for 400 msg, $35 for unlimited.
- No headphone jack, must use proprietary dongle instead to connect headset.