Currently, I am developing a plugin for jQuery to make using Google maps easier.
The code is available at
http://hg.digitalspaghetti.me.uk/jmaps/
I am currently working on improving the source code as well as adding full documentation. Starting with the Google API and documentation at
http://code.google.com/apis/maps/ I'll bring the plugin up to scratch, as well as gather more links and examples here.