Solaris 10 is a nice and kinkin' OS. It's even partially free (as in speech, see http://www.opensolaris.org), it's very well known and supported, scales extremely well. The only downside is that it's far less common as an internet hosting platform than Linux or FreeBSD. However from a perl development point of view it won't make any difference, if your code runs on Solaris it will run on FreeBSD, and the reverse will be equally true.
Comment on Re: Solaris 10 for Perl development? Problems? Upside? Your thoughts, please!
if your code runs on Solaris it will run on FreeBSD
But perhaps not all versions of *nix.
A firm I worked for moved from Solaris to a flavour of
Linux, I'm not sure which, We found a few bugs popped
up which Solaris Perl tolerated but Linux Perl didn't.
Also, if you intend to backtick or system to use OS
stuff, some of the switches are different.
It's not a huge problem, but it should be born in mind.
As for Solaris as a developer platform, I never had any
problems, but when we moved to Linux, we got much better
performance on cheaper boxes. Of course, that may have
been due to the System Admins.