Android Account types missing google
If you need to install GMail, you can snag the APK by pointing your Android's browser to DroidLoad and downloading it from there.  You should be able to either launch it directly or save it to your SD card and then launch it via navigating to it in a file browser and clicking on it.  There are more detailed instructions on DroidLoad if you problems.

You should probably also install GTalk, as if I'm remembering correctly quite a few other apps rely on it's transport layer for various things.