I just posted the final Maildrop 2.0 build. You can download it from the project download page, or if you're already running Maildrop, just restart it, or pick check for updates to have it autoupdate.

Major new features include support for email attachments, the new buttonbar UI to replace the scripts menu, and the configurable search column for the 'What' search. Maildrop 2.0 runs on Tiger and Leopard, I have some ideas for the next version, which may mean its Leopard only.