Solicits for DC Comics due to ship in May 2007 have been posted on various websites: Comic Book Resources, Newsarama, Comics Continuum, IGN, ComicList, and The Official DC Site. Here's the Aquaman stuff I spotted:
Tad Williams visits San Diego... or is that Sub Diego?... in Aquaman: Sword of Atlantis #52.
Did anyone spot anything else? It's looking like a pretty light month for Aquaman.