wxPerl is beautiful. One might reasonably ask why all other Perl GUI toolkits have not died a horrible death now that wxPerl exists. The answer is simple: try installing it.
I had heard that it was a pain to install, but now, after hours of searching, reading through failed compilation output and much googling, I have finally managed to compile and install it (after ignoring some mysterious "make test" failures) and can add my voice to the "it's a pain to install" crowd. Still, it's beautiful and it appears to have a much nicer OO interface than Tk. I'm just happy this is for a personal app and not something that I'd be forcing someone else to install.