Both $ (Speed) and graphic design (CSS + Images).

I understand the apprehension some may have with changing a web community they have been a part of for many years but it doesn't have to even be that drastic. As Argel mentioned earlier, just making Perl-Blue the default for first time visitors and Anonymous Monks alike would be a nice improvement. Simple as it is, I like the design of Perl.org. I'm not suggesting we copy it, merely that a design refresh does not have to be so dramatic and upsetting to it's users.

All of the UI could stay exactly where it is. Maybe simply making the site look less — ahem — tabular? We could even try it as a style theme so monks can test it out.

I don't think people will switch to language XYZ because of a community's dated website design. The content and members will always be what's most important but a set of nice drapes and an area rug could go a long way to making it more welcoming.

Who knows, we may even crack 5% brand recognition ;—)