Now that I got your attention:
There is a new release for jsc with two new screencasts. This time around you are able to omit [Script] attribute and ditch the tools/build.bat. The jsc solution now includes the jsc.meta compiler which will talk to the other compilers for you.
I am also experimenting with pre compilers. For example the Forms example makes use of TextualUserControl and TextComponent. Without getting too technical they generate a new assembly and add the reference to your csproj file. This opens up some really interesting possibilities. I will talk more about this in future posts.
Future pre compilers in jsc solution could include automatic stub generators for java jar files and for flash swf and swc files.
Open java version: