Do any official Blu-ray titles have SD video only?

[PuzZLeR]

I understand that blu-ray discs are all about HD playback otherwise we can just use DvD.

However the BD (and even AVCHD) spec does allow SD resolutions at 720x480 NTSC and 720x576 PAL.

Are there any titles that actually use this? If so, is it just available in MPEG-2? And if someone knows further details like display aspect ratios, pixel aspect rations, bitrates, codecs used, etc., I'd be very interested.

One reason I'm curious is because I do eventually want my SD personal, and family, content seeing the light of day on the bigger blu-ray discs. For example, using the H.264/AVC codec (or VC-1), I can burn roughly 40-50 hours of high quality SD video onto one 50GB playback disc and that's very appealing to me for sometime in the future.

Sorry to bold but, could you imagine what this can do if the TV series companies decide to go this route? We can buy several complete seasons on one disc!

Thanks for reading.

(And no, I'm not talking PS3 playback, or pirating, or DivX/Xvid rips, AVI/MKV/MP4, or anything like that...)