I don't do that much Perl these days. Though I've done more Perl development work in the last 3 months than the last 2 years probably. At the moment I'm doing some more fun Perl/SAP work at work and SAP is more mentally stimulating with Perl than without it!
Yesterday I was thinking, "Is now the time to start taking advantage of things in Perl 5.8?". For a long time I tried to avoid using anything from Perl 5.8 that couldn't be used on older Perls, I'm now thinking it's time to move on and start actually using stuff from 5.8 that can't be used in 5.6 - and dropping anything that is on it's way out in 5.10 and beyond.
I know that stuff was introduced into the 5.8 core but I didn't really bother with it as we still use 5.6 at work and initially a lot of people were still running 5.6. Time moves on and I think it's time to re-read my PerlDelta docs and starting doing new things. I know that there are lots of cool things in 5.10 but I think they are a bit new yet to use given the number of 5.8 and older systems.