I just switched from Charter cable to U-verse last Thursday and I wanted to post what I found that worked for me. I have the Cisco IPN-4320 DVR.
I connected my Slingbox to the Cisco DVR using component cables. I am using the Cisco HDMI output for my Samsung tv.
I used the AT&T Standalone DVR as the connected device in the Slingbox setup.
I set up the remote with AT&T as manufacturer and model VIP 1216.
So far, everything appears to be working well including with my Droid.
I can't guarantee every single button works because I haven't used all of them yet.
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