You're talking about something like the Unix Rosetta Stone, but for translating C/C++/Java/whatever concepts into Perl?

So a C++ programmer could think to himself "I wonder what the constructor syntax is in perl?" and find out that it can be just about anything :-)

I do actually quite like this idea, but you'll have a couple of problems: firstly, you'll encourage people into bad paradigms. There's no point writing Java with Perl syntax when you could write proper Perl. You need to teach people the big picture, rather than one-to-one comparisons of features. Secondly, TMTOWTDI - Do you teach a C programmer to use printf() or print()?