You'll find that linux does a lot of handholding (helper scripts) that Solaris doesn't (or does in the wrong way). Aside from that, the only big issue with Solaris is that you have to hand-build a lot of the tools yourself.
There's a little bit of salvation in [sunfreeware.com...] but I often find that they are just shy of what I really need.
I'm Compile King anyway, I prefer to build everything myself so that I know how it was built. If you decide to go this route, you can google for my compile notes, e-mail/sticky-mail me with any questions you have about them.
(edited by: DaveAtIFG at 2:58 pm (utc) on April 6, 2002)