Yes! I'm very interested in this. Please release it as soon as possible
I'm going to build a cabinet based around the hardware out of an old Dell C610 laptop and would like to run a minimal linux based mame installation.
So far what I've seen, AdvanceCD, ZXMAMECD, Lincade and KnoppiXMAME are all either quite out of date, a biatch to install, not easily customizable or far from what I desire in terms of boot/ui.
What you described sounds perfect, booting directly into a mame launcher with customizable appearance.
I'd even accept partial package or just a tutorial on what you have done.
I'm also willing to help out in any way I can, I'm a software engineer with considerable experience in this kinda stuff.
Let me know if you need a hand but in any case I hope I see something from you soon
ps. Just like timb in the post above, I registered to this forum specifically to state my interest in this.