Holographic storage wouldn't be probable in google's case, at least with my experience of it, however, it is going to be released to the public soon with 300gig discs, the problem with holographic storage, is it is just that, storage, much like a dvd or such medium, at least most of it it, so you have to go and get regular old HD's to serve something like that, with google's stock at umm like $463.63 todays close, thats for ONE share, one could easily see how it would be possible for them to have slave farms of servers, most larger places, like hotmail and yahoo are giving at least one gig to their users and there is another site 30gig.com that offers 30gig of email storage, (invite only), and THATS huge LOL, I mean, hey for $60 one can buy a 80gig harddrive, thats not even OEM, thats 40users, well for per stock share, you have around eight harddrives, thats 240 users, with only one share... imagine with a couple hundred thousand shares could do, I mean a thousand shares supports at least a quarter million ppl, thats with them filling there space. What if they use just dynamically sized partitions, much in the lore days of redhat, or with VMWare, make a single file that acts like a filesystem, and expands to a limit of 2gigs, much less space needed, more space needed? give the admins a warning to feed the machine, and more space is created... boom follow the KISS method.... may prove valuable.