I missed some of the excitement of the last two weeks because I was away. I tested the latest versions of ConTeXt and luatex and have some problems:
1. Is there a simple switch to between luatex and pdftex? If I want to write typescripts with the new name: syntax, I'd like to have the old typsecripts as well to remain compatible. So: is there something like a simple switch \ifluatex?
2. I tested with a number of OpenType fonts from my Adobe Type Classics CD: ConTeXt Mkiv can address these fonts (which is wonderful), but it does not read the kerning information. I don't know whether this is because Adobe's kerning tables are so big (kerning appears to work with the TeXGyre fonts and Latin Modern) or because the Adobe fonts have these tables included in a somewhat different way.
Will be back with lots of more question re. Greek soon!