T-Mobile launched G1 promising it to be more "smarter", "connected" and a grammatically intelligent phone . Watch this commercial
Home Screen Customization
Home screen customization lets you include gadgets — a clock is included, so is the ability to litter your desktop with pictures.
Media in the Browser
Play YouTube videos directly from web pages. Goes to YouTube app, just like iPhone. Save photos to the phone. Multitasking — downloads in the background. Listen to mp3 streaming.
Reader and Photos
Keep up with friends with Twitter. Window feature to choose which window you want to be in. Reader works the same as iPhone.
GPS Pictures and Copy and Paste
Gps information is great and you also have that nifty feature which Iphone lacks ie. Copy and Paste