Correction

I really haven't found any way to contact the CoasterBuzz staff or submit corrections, but I've found a couple mistakes regarding rides at Six Flags New England (it being my home park). Superman Ride of Steel is listed as having 32 riders per vehicle (it's 36). Also, the "Little Twister" is no longer at Six Flags New England and Thunderbolt only has one vehicle.

Please let me know of any more appropriate way to submit corrections...

This is the proper way to make corrections. You are doing the right thing!

Actually, there is a "Contribute" button on the "tools" menu (right side of the screen).

I actually tried that once, but my corrections were never made. Perhaps it is because you can only add a new ride and not amend an existing one? In any case, it's here now.