Hi gamer dudez.
There is a whole truckload of new stuff that has been put online over the last few days. Extras! Sounds, pictures, screenshots, title snaps, cheat files, mameinfo files, the list goes on. Everything you need to have a complete Mame experience is now available for your leeching pleasure.
To get the files, you will need to be a registered user, and go to the bulk download area.
Have fun folks.