I would look into hosting the system at someplace like softlayer, pay special attention to the cloud offering they have coming out next week. For file store yo

I would look into hosting the system at someplace like softlayer, pay special attention to the cloud offering they have coming out next week. For file store you maybe able to save some money using http://www.danga.com/mogilefs/ http://www.danga.com/mogilefs/ instead of S3. For your datastore checkout http://www.igvita.com/2009/02/13/tokyo-cabinet-beyond-key-value-store/ http://www.igvita.com/2009/02/13/tokyo-cabinet-beyond-key-va... Also worth taking a look at is http://hadoop.apache.org/core/ http://hadoop.apache.org/core/