It works great. I've been using the Series 3 with my first generation Slingbox the past few days while at work (overnight shift, TV options at work suck).
Put the Sling's IR blaster right over the clock. That's apparently where the IR sensor is on the TiVo. To the left of the clock didn't work.
I'm using the latest SlingPlayer, 184.108.40.206. While the Series 3 remote isn't in there, the Series 2 is and it works fine. However, the Series 2 remote lacks the Aspect button. In its place is the Standby button (which works). You'll have to set the Aspect via the TiVo menus.
The new Sling Player supports rapid switching from 4:3 to 16:9 (it's in the Video Size context menu). The TiVo outputs via s-video or composite in whatever mode you want. For example, right now I have the TiVo set up for a widescreen TV and have Aspect in "Zoom" mode to watch a letterboxed 4:3 show without the letterboxing. The Sling Player is set to 16x9 mode, and on the Player it looks the same as my TV.
It'll be better once Sling updates and adds the Series 3 remote, but it's quite usable as it is right now.
Note that you can hook up to two devices to the traditional Slingbox player - one over s-video or component, and one over RF. I have my SA 8300HD on the RF input and my Series 3 on the s-video input. You can't use the third input (composite) and retain audio, though, because there's only one set of left/right audio inputs. The Sling Player will let you define something on all three video inputs, but you'd need to find a way to switch the audio signal between the s-vid and composite video inputs.
Well, it's not working any longer. BBC World won't stay on the screen. The Slingbox is attached to the s-video output of the TiVo, and now while I'm at work tonight the a TiVo banner has popped up to tell me that, "Viewing is not permitted using the TiVo Digital Media Recorder... Try another TV input."
Meanwhile, my SA 8300HD cable DVR works fine.
This is only affecting channels with a CCI code of 0x02, so BBC World, Logo, most HBO (not HD and I think family/signature), all Starz but HD, and all Encores.
I'm back to considering returning the Series 3 until these hurdles are worked out...
Last edited by IceStorm; 10-07-2006 at 08:09 PM.