Symbian have updated their wiki with some information on Flash Lite development.

Here's the blurb from their site:

This article presents the information necessary to get started creating Flash Lite applications for the Symbian platform. It gives a summary of the tools necessary and a basic example, adapted from Adobe's documentation.

You can read the full article here:

http://developer.symbian.org/wiki/index.php/Flash_Lite_Quick_Start