Great minds...
I enjoyed doing the Google Earth/Maps stuff because their APIs are a pleasure to use. You should definitely give it a try anyway. It's all the code behind the scenes (currently 600 files!) that takes the time.
If there was anything you were going to do with yours that you think I should add to mine, let me know. The W&B calculator is a good idea, I'll have a think about that.
Thanks for your kind comments!