Very minor, but when I start an on-demand snapshot and then change my mind (on purpose), clicking the Cancel Running Snapshot button sends me back to the dashboard.

It did take a little while to cancel the job (during which time I clicked the Cancel button repeatedly wondering if it worked), but it did work (without deleting my older snapshot from 4 days ago):

snapshot    2009-04-07 21:42:44      2009-04-07 21:43:31      47 seconds     userAborted

Again very minor, but it would be reassuring to show it as canceled immediately (--cancel pending--) and asynchronously cancel the snapshot job