--The next New Frontier novel should be out mid next year (2008)
--On more mirror universe New Frontier (following the recent story "Cutting Ties" which was published in the anthology Obsidian Alliances) he had this to say; "I’m kicking around the possibilities in my head, yeah".
--On a new New Frontier comic this; "It has been discussed, yes. Anything is possible"
Peter David will be returning to Trek sooner than any of that though with his new TNG novel Before Dishonor later this year.
Have a chat about it at all at the Trek BBS, here.