I think I already know the answer to this question, but thought I'd ask it anyway, especially as there might be a second 360 in it for me ;-)
I record quite a bit in HD now, especially as it looks great on my (720p) Panny plasma. I currently also have 2 x original xboxes, runing XBMC, which serve as games/avi playback machines. I've just found out that I may be able to playback avi (divx/xvid) via the 360 dash (a good thing) but wanted to know what would happen in the following scenario...
HD recording -> 360 (extender) -> Grundig SDTV (connected via scart)...
I tried it with the XBMC xbox and it wasn't happy but it's an old box, running a 733MHz cpu...plus it's not supposed to handle HD video. I know my 2nd tv is only SD but I suppose I'm hoping the 360, as I've told it it's connected to a standard def tv, will make the HD work anyway...that's what I'm hoping anyway...
If I can get this working, then I'll have at least one chipped xbox for sale...another wife pleaser...although I'd have to sneak the new 360 in somehow

I will eventually be replacing the SD Grundig but I was hoping it wouldn't have to be too soon.
Justin.