According to this EG.de piece, Miles Holmes, lead designer of BioWare's Sonic Chronicles, has said that the company is considering DS versions of Mass Effect, Jade Empire, and Dragon Age.
"I tell you which one I would want. I want the Mass Effect one," said Holmes.
"We have a lot of big plans for Mass Effect. Having a DS version would be an awesome way to keep interest alive and keep it going in addition to [Mass Effect 2]."
More through the link. Check out the EG.net story for an English version.