perl.com perldoc, and many other perl sites were nicely rehauled recently.
IMHO perl.org looks better than before, but I still haven't figured out what that annoying, fixed toolbar on top of the perldoc site is supposed to do for me. I can't remember using it a single time, and yet it eats up a sizable portion of my screen, and is annoying by not behaving like the rest of the site.
Which is exactly what I meant with not sacrificing usabilty for a new UI.
Yes, perlmonks is slow. I've never denied it, and it sucks. If somebody changes that substantially and with long lasting effort, I'll buy them a beer at the next YAPC we both attend. Every effort on performance is very welcome.
Yes, a modern UI would be nice. If it doesn't introduce annoying stuff just to be modern.