For some reason I am unable to find the Market app after the last ROM Upgrade (on rooted G1 Android ).
To fix this I needed the vending.apk file, which is the installer for the Android Market. You can find it easily over the Internet.
You can’t install the Market app as a regular android apk (adb install vending.apk), instead you will need to copy it to /system/app on the device, and do a restart.
Step 1. Make the /system partition writable . See this article on how to remount, or do the following:
(note: you will see a list of partitions, locate the /system one)
# mount -o rw,remount -t yaffs2 /dev/block/mtdblock3
(note: mtdblock3 is /system on my device)
# chmod 777 /system
Step 2. Copy the Vendink.apk
d:\>adb push vendink.apk /system/app/
Step 3. Reboot
d:\> adb shell