Differences between 1.5 and 2.1?

[Guest]

I noticed with the lightspeed kernel that it only supports 1.5 ROMs. I just wondered what the differences were between the 1.5 and 2.1 releases of Android.

Is the kernel config readily available for 2.1?

[Guest Soaa-]

Android 2.1 normally requires a .29 kernel, or at the very least, an ugly patched .27 kernel.

It's not just a kernel config. Drivers have to be rewritten and such.