Hi.
Packaging ruby: you only unzip it and set the path. A stripped-down ruby: probably parsing (even if manually) ruby scripts from ConTeXt to determine which packages are needed, and delete the rest of the tree/ruby libraries :)
I'm sure that not the whole 70 MB of ruby are needed to run ConTeXt.
Mojca
Well, I strip the minimals to less than 30MB, removing all the fonts except latin modern (in fact I can remove that 10mb too because I fully depends on commercial fonts), and all the pdftex/metapost/xetex/ruby/perl... stuff. Now LuaTeX and MKIV works perfectly. Only one binary, LuaTeX, is in the ultraminimals. If anyone is interested in that, I can mail it as attachment personally (about 9mb bzip2 package). BTW, Hans, why do LuaTeX still needs type1 format of LM fonts? please check type-ini.tex. fonts like rm-lmr* can be substitude by opentype format instead. Only math typefaces of the type1 font is needed now. Maybe this is because the LuaTeX math mode support? Yue Wang