There isn't any Perl support within the Mono project per-se. However, there's a dotPerl effort that someone mentioned on one of the mono mailing lists a week or two back, and there is also a Visual Studio.NET module/plug-in of some sort that ActiveState makes. Since these would ultimately produce .Net assemblies, you could then use them under a Mono system. However, both tools (as far as I know) would have to be run under Windows environments that support Visual Studio-level development (i.e. W2K or newer, excluding WinME).