Looks like a cool build of mame.
I'm still waiting for some to break each 'options' thats out there into diff files. So you download the latest source, run the 5 - 10 diffs your interested in, then build.... Sure some might not work together, but I bet most people are interested in 2 or 3 specific items...
Then it would be cool to build that into an autobuilder thats triggered from a website... So you select what your interested, it builds it and puts the output into a link for download.
Now that would be a cool system.