Thanks for the info Tina, been looking forward to more info since it was first mentioned here since the beta isn't available in my region.
ETA on availability of this service worldwide?
and access from 360 to allow Cores to operate without attached memory?
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Also.. with 690.4 MB or whatever megs available in the demo skydrive account but only 500 in the beta (versus 2.88 gigs on Google [mail], etc) isn't kind of off-putting to know that there is so little space available through Skydrive (once out of beta)? Unless at some point everyone will have 8-10 gigs (probably paid for/backed up/secure), though the blue 690 used was only a fraction of the available white. 
Again if 360 users had a browser perhaps if SkyDrive was that secure and available to them it could become an alternative to attached storage and wouldn't be constrained to a location or failure (though temporary unavailability now and then would be a forgivable issue).
edit: wow.. watched it over again.. it says 490.4 available not used.. HA.. still 500 online megs would replace an MU attached to 360. The bigger the available storage (2-5 gigs) the more useful it would be to 360 Core users.