Logmein.com - remote management of computers

https://secure.logmein.com/US/home.aspx

Bsdiff Bspatch

bsdiff and bspatch are tools for building and applying patches to binary files. By using suffix sorting (specifically, Larsson and Sadakane's qsufsort) and taking advantage of how executable files change, bsdiff routinely produces binary patches 50-80% smaller
http://www.daemonology.net/bsdiff/

Couch DB

Couch DB book
http://books.couchdb.org/relax/