Israeli start-up Onavo’s Extend application compresses downloaded data and saves the iPhone user 80% of roaming charges. Onavo is just one of the 150 Israeli companies exhibiting at the Mobile World Congress in Barcelona.
http://www.globes.co.il/serveen/globes/docview.asp?did=1000729386&fid=1725
http://www.youtube.com/watch?v=GQYbCPfnQys