I like Java and OO generally, but I'd be stuck - or at least much more annoyed without Perl, and most of my site is in PHP. I can knock up a stupid web toy or an RSS aggregator or some other small piece of smartness with it in my lunch break that will work on all but the most basic of servers, so other people can use them too with minimum effort. And Perl has saved my arse and other people's arses numerous times at work.
I'm currently learning Ruby, which claims to fill the role of a proper OO Perl; dunno yet. But really, it's all "whatever work best in practice". Anyone who gets hung up on a specific language is just being unrealistic. If your whole team know Java and you want to put together a web app you're going to use JSPs. It's very rare that you have an entirely free hand with platform, colleagues etc.