Has anyone tried to compile and run the Java Lucene code base using http://www.janetdev.org/ This janetdev says it is a new web site building an open community dedicated to enabling Java as a first class development and runtime environment for .NET. They seem to have downloads on sourceforge and say they are based on Apache Harmony.
About 4 years ago I built a binary of Java Lucene for NET using the Microsoft J# compiler. Total effort was about a couple hours. It ran the benchmarks I was interested in evaluating. I first did the Java Lucene 1.9.1 release, and then I later built off the trunc which I understood was to become the 2.0 branch. See http://people.delphiforums.com/gjc/lucene-java-vjc.html Of course a lot has changed in the Java world since early 2006. Microsoft dropped J#, and Sun announced an open source OpenJDK.