Comment Recomendation: Onsight, Internal Training Depts. (Score 3, Informative) 43
Most of the instructors were using stock Motorola class stuff, some of which wasn't great, but if you have a good instructor that can make up for it.
The best instructor was James Lee from Onsight.com who had a bunch of custom Perl (beginning and advanced), CGI, TCL, and a few others, all of which were outstanding. These are the guys that wrote Hacking Linux Exposed and I recently got Open Source Web Development with LAMP that is just excellent, and really mirrors their training skills.
I don't know if they do classes outside of Motorola (their web page seems to indicate they do), but I'd highly recommend them.
In general, if you work at a big enough company, they probably have good internal training classes available, or can send you to classes that are good outside.
I'd be wary trying to pick one on your own, though. I had very bad luck with some "big names" like Learning Tree which seem to just cobble together classes quickly, and try to debug them with you as the guinea pigs at hundreds of dollars a pop.