I was just thinking about a couple things today while watching my laptop struggle to execute Kriging.

How cool would it be if someone took the Virtual Earth Shapefile Reader and mashed it up with the MSN Messenger Virtual Earth plugin? Then anyone could send a shapefile to anyone else via an instant message and have it already viewable inside a small browser window. Sounds cool to me. ESRI’s GeoChat seems to be similar to this, but I believe that one requires ArcGIS to work.