Internet startups come and go with dreamlike rapidity. A recent instance that seems to be gaining a bit of traction is bitcasa.com. It offers the startling promise of infinite storage space, somehow seamlessly melding your hard disk with the cloud. One suspects that this seamlessness might stumble against the roadblock of slow adsl connections, but perhaps it will have wings in lands with better broadband. If you sign up for the beta, you will be advised that tweeting or posting about your discovery will hasten your journey towards actually receiving an invite.