I was banded 8 days ago and I was able to walk around the wards the morning after the surgery. It has helped me heaps to be able to move around as I haven't had a lot of pain, just discomfort.
If you can get up and walk you will find it helps a lot even if you can only walk a little bit.

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PreOp Diet Start Weight: 142.9kg
Op Start Weight: 132kg (11/07/2009)
Current Weight: 129kg (29/07/2009)
Total Loss to date: 13kg
Personal Goal Weight: 90kg