Wow that would be so cool! As a staggering coincidence, my characters are currently holed up in Saltmarsh trying to work out why the henchman of a former PC has been found by the Dunwater Resistance partially transformed into a snake-man. Maps of Burle and Saltmarsh would be very useful indeed.
In addition, is there any gazeteer information about the towns beyond what is listed in the old modules? I have noted that some recent LGG modules were set in Saltmarsh and that Ned Shakeshaft - the assassin from the original modules - is now Saltmarsh's mayor! It looks as though the area has been developed quite a bit but I'm not sure where to find the information.
