I started researching solutions for mounting Google Docs as a drive (like DropBox!) - sharing here, interested to know what I missed:

http://memeoconnect.com/ ($9 a year, great system).

http://www.gladinet.com/ ($40 one time for Pro features, "Free" version that works fine with some advertisng - aggregates other cloud storage solutions)

http://code.google.com/p/google-docs-fs/ (Free FUSE API - downside is complex install for non-techies)