Actually, one can have a Dukes of Hazzard Tinycore that boots and plays the whole theme song as well as display a wallpaper in less than 15 MB. Oh well, was fun putting it together.
Regardless of the merits of Debian/Mepis/Antix, and they surely have their place and value, just don't expect the ability to squeeze Debian compatibility into a 500mb or 600mb iso to pique a lot of interest here, even if modest hardware is supported.
And we don't have 20,000 packages available, but if anyone sees one missing that they would like and they request it, there is an almost certain chance it will be packaged in short order
Anyway, all that aside, best wishes on the project.