I'll follow up on that last post soon, but in the mean time.......
I was chuffed to see that Apple have finally improved .Mac for no fee, as it was pretty expensive for a pretty crappy service before. Thew new iLife '08 integration features are cool, but the features I use most are iDisk and Mail, both of which consume online storage.
The fact that my limit has been upped to 10GB for free is awesome, but there's a gotcha. I looked at the storage and thought "Hmm, I'll probably only need a few GB for Mail, so I'll use 7GB for iDisk". Which sounds reasonable.
However, since I use iDisk syncing, this immediately created a 7GB dmg file on all the Macs that I sync. If you've only got, say, 8GB free on an old Mac, this is a problem (I have had calls from relatives whose Macs have mysteriously run out of disk space all of a sudden too).
The real PITA though is that if you subsequently shrink your iDisk capacity online, it appears that your computers do not shrink the corresponding dmg file. I got round this by turning off iDisk syncing, deleting the archived iDisk and then re-enabling it, which created a new dmg file of the right size. This involves a fair bit of patience though, even on a fast broadband connection.
Just thought I'd share.......