When it comes to firmware updates for the Android Dev Phone 1, owners are pretty much expected to take care of it themselves, but for Android Dev Phone 1 users who prefer an official update Google has put out Android 1.1 firmware update for the unlocked version of the T-Mobile G1.
Android 1.1 includes a few fixes to do with POP3 accounts, but paid applications are now also supported, but with a small catch which is owners of the Android Dev Phone 1 will not be able to access any paid apps which use Android’s copy protection.
This is due to the Android Dev Phone 1 being rooted out of the box and thus able to read and write the folder protected applications are stored in. So although the Dev Phone 1 can access unprotected apps this probably will only be a handful.
Source — phandroid