After some work, and zooming in, I got the actual number of blocks on the HD: 322,421. Now, this number isn\'t significant without a basis for comparison to how much a save file will take up.
According to the original picture, the size of the DolphinClassic Swimming Frenzy save file takes up a measly 4 blocks.
What does this tell us? Well, let\'s say that the maximum size of a save file would be 10 blocks. If so, it means you\'ll be able to store 32,242 files that large. Not too bad....
This is all speculation right now, as the schot was take off a dev kit, and the size/storage capacity may change. But it\'s nice to know how much room the HD will give you in terms of saving games.
I think that the HD is partitioned like this:
Data Cache: 6GB
Music: 3GB
Save Files: 1GB
In other words, you get over 300,000 blocks in 1 Gig...i think.
All from the XBox IGN boards, thanks to DT Spike.