I agree with parts of Shaun and Rayder's posts.
We are talking about a rom release list here, so IF the rom can be loaded on a DS flash cart(R4, cyclo, etc), slapped in a DS or DSL, and it works, then it should be in the DS list. However, it does not look like the older cards can run these yet... maybe they can with a software upgrade, maybe they can't.
Right now it's the akaio 1.5 beta and the SC DSOne/i that can load these(in DS mode)? Or is it just rumors and it's emulator only that can load these as DS or DSi?
If they can, and more carts support them, then by all means keep them in the DS list, and as has been mentioned, have a designation in the info box as to DSi enhanced as well as having a filter option: clickable box, drop down menu, etc to select show all, show DSi enhanced only, or show DS/DSL titles only.
If it's just smoke and mirrors, no carts can run them, then let's have the DSi forum and start it out with these titles.
Otherwise, in the theoretical future when the next gen DSi rom carts are released and the roms can be loaded on the shiny new DSi's with DSi features accessible from these carts using these roms, then have the first few posts in the brand spankin new DSI rom section with these titles listed with their DS number and in the post: a link to the prior DS rom post from the DS section and an appeal to discuss the enhancements only in the new DSI forum topic.
In fact, if the emulators can act like a DSI, do we have any DSI ware roms? If so, then by all means let's start the DSI release list and have the grandfathered in DS numbered titles shown there as well with the stipulated restriction to enhancement discussion only on the DSi forum.
Right now I don't see any DSI specific sub-forums.... so I am guessing no DSI ware roms yet to go along with DSi only roms (which don't exist)?