Yup, those two modern day, Dick Tracy-like games now have official sites. Now that the print mags have let the cat out of the bag on Sony's first party PSP games to be shown at TGS, the internet is getting a treat. If you're interested in getting a better look at either of these titles, you can check out the Enkaku Sousa website here or the Diamond and the Sound of a Gunshot one right here.
This blogger recommends checking out the Enkaku Sousa website purely to listen to the background music. That, and the fact that there's some footage on the game you can watch. Diamond Gunshot's website on the other hand, has less to offer, but drop by if you're interested.