I really love EmuMovies Sync but I'd like to offer one suggestion if I may:
When updating artwork, I understand that it is possible to select all artwork types, but it would be great if you could select a subset. For example, if I am only interested in Adverts, Icons, Logos and Video Snaps for MAME, I would love to be able to check them all from the list of available artwork categories and then hit 'Go' to update them.
As it stands now (and please correct me if I'm missing something here), I have to manually select each sub-category and then update them one by one. I'm happy to provide further clarification or UI suggestions if required.