I'm all for a PS3 version--just make sure the DLC is in flat-dollar amounts. I'm tired of paying $X.99 and having pennies leftover that can only even themselves out with my hundredth purchase. And I'd love DLC on a PlayStation DDR for once.
As for the topic of song content, I'd have to say I'd like some old licenses rather than just old songs in general, which is going to cause giggles over at Konami of Japan. Hero Discotique Mix, Cat's Eye Ventura Mix, the Captain Jack version of Odoru Ponpokolin, and maybe Moonlight Shadow and Temple of Love. These are classics that have, for the most part, not been seen outside of Japanese releases. And don't forget to include DO ME (H.I.G.E.O MIX) again! That was a good revival from 4th PLUS. I'd also like to see a slew of beatmania crossovers and revivals. INFINITE PRAYER -floating flock style- (another) comes to mind. Euro licenses and some Xbox-exclusives would be excellent additions. I'd love to see Oh My Gosh, Where's Your Head At, IN MY EYES (Midihead Remix), or i feel... (T.O.Y. Remix). No NU FLOW, please.
For graphics, I'm not terribly picky. Yes, I would love high-res; that's a given on any current-gen platform (Regardless of generation), but I would accept 720p support if it meant no lag. One of the big things people seem to be forgetting when they complain about the sync/lag of the Xbox titles is that they weren't produced by Konami of Japan, but rather Konami of Hawaii. The Japanese studios are responsible for pretty much all of the PlayStation and PlayStation 2 titles. I'm not dissing KoH, they did great things with the Ultramix series that I really appreciate, like the licenses (Jondi & Spesh, Midihead), the fact that the Xbox games have DLC, etc. What I am saying, though, is that if there is a PS3 version, it will more than likely be developed by a Japanese division, and I don't think they would believe the lag cause by video, higher resolution, or whathaveyou would be acceptable. Thus I have more faith in a PS3 DDR being a more solid and worthy release.
On the topic of backgrounds and videos, I have to voice that I'm sick and tired of the mundane platform backgrounds. Those honestly need to go. The characters could be high-res like the Xbox versions, but please, less ****ty. You people have had your fanservice already with the SuperNOVAs and Ultramixes, and enough is enough. Yes, Blu-ray discs have tons of space. The single-layer discs hold 25GB, and the dual layer discs hold 50GB (To correct an earlier post that claimed all Blu-rays hold 50GB). The early DDR games didn't have much in the way of background videos. From their initial release up until I want to say around the MAX series, the games used sprites and image animations for backgrounds. In the MAX/MAX2/EXTREME era, most of the songs still used those, though some songs had actual background videos (Like most home version licenses; Dream a Dream, In the Navy '99, Conga Feeling--although Conga Feeling was a revival song). Til this point, most of the games were reasonably sized. Maybe 2, 2.5GB for the PS2 versions. Then came the DDR STRIKE/DDR EXTREME2/DS Max line of games that had full background videos for, if my memory serves correctly, SOME songs, and the games took up almost 4GB. But then they released the SuperNOVA titles and now we've got songs either with videos (Xepher) or with nothing, and the usage is back down to just over a gig. If Konami wanted to make full background videos for every song they put on there, I'd put my support behind it. The platforms are disgusting, boring, and distasteful. It's almost like they thought Pizza Box would be trendy.
Konami, I'm sure you've got something for the PS3 lined up, and I'm glad, but whatever you do, do NOT pull another DDRMAX. I don't want to have a game with 50 songs and little to no features.