Hi,

I uploaded a new beta. Last week(ends) fixes are merged in.

There is also an experimental plain version (luatex-plain.tex which you can rename to luatex.tex if needed). That gives you a plain tex with stripped down context mkiv font support (only the minimal amount of lua files are loaded). Some more info (also about generating the related font database) can be found in in luatex-fonts.tex. Of course it's no replacement or context but it seems to work ok (we occasionally need plain tex for testing). It's also not related to the upcoming layered context (aka metatex).

Hans