RyallTime (IDW editor, Chris Ryall's blog) has posted cover art for first issue of IDW's New Frontier series. The Quad-cover:
According to a post by the artist Stephen Thompson on the TrekBBS, the characters pictured are: Elizabeth Shelby, Mackenzie Calhoun, Zak Kebron, Burgoyne 172, Si Cwan, Robin Lefler, Xy and Edward Jellico.
RyallTime also posted the Captain Peter David cover:
Go to the original post, here, for more info on these covers.