I'm in the lone coder role now. Perlmonks is a great resource for taking up the slack left by the absence of other programmers.
I also recommend checking out code that's available online. Even crap can teach you. Once, I found an idiom I used often in a piece of frighteningly bad CGI off the net--this discovery caused me to carefully analyze what I was doing in that code, and I found that it could generate some obscure errors. Other code has been education for the complete opposite reason.
I have also been addressing the issue by training a few of my coworkers. This has helped me by forcing me to clarify my understanding of various bits of 'elementary' perl. One of my proteges has matured into a programmer capable of using OO Perl. We need to start doing code reviews for each other. I've got two more pupils coming along, with another person expressing interest. One of them looks like he may surpass my level of ability fairly quickly. It will be good to have someone on hand to bug with questions.
TGI says moo