Solaris FAQ. Start here. Read it ALL before asking anything. Well, at least read the questions in order to realize that your one has been asked so-o-o many times before.

Sunsolve Online. Obvious, isn't it? Make sure your manager understands it and pays for support contract, so  you can search it the contract database,  too.

docs.sun.com - Most of the answerbooks and reference materials are available here, even some hardware-related manuals with the pictures, diagrams and parts breakdown.

Newsgroups. Bulleting board. Search in comp.unix.solaris group. If it fails and you are sure the question isn't in the FAQ, post it to comp.unix.solaris.

Sun/Solaris freeware - source codes and packages of popular free software.

Solaris x86 (On Intel) hints and cookbooks