I no longer provide ANTLR consulting, for now I'm working at a startup.
Browse my GCC translation framework at http://www.antlr.org/grammar/cgram or download it at http://www.antlr.org/grammar/cgram/cgram.tgz. It's a complete source to source transformation system based on antlr. Possible applications include extending the C language with type safe pointers, instrumenting code, implementing an Aspect Oriented compiler, source code analysis, or specialized debugging and profiling code generation. It's like having a compiler without the executable generations.
I also wrote an Advanced Revelations R/BASIC to Visual Basic translator to translate 240,000 lines of Arev code for the Harry and David catalog company's order entry system. I don't own the code I wrote for them but I know the translation strategy very well and would love to do such a project again. Email me if you are interested in me doing this for you.
I used to provide a good deal of free support as well. You can see what I was up to recently from these links.
Here are my entries to the antlr FAQ: http://www.jguru.com/guru/viewfaqs.jsp?EID=111
Here are my answers to the antlr Forum questions: http://www.jguru.com/guru/viewforumanswers.jsp?EID=111