Come visit our blog and read about various RPG topics mainly focused on Fifth Edition.
Our forum hosts several play-by-post RPG games; it's a great way to play in between live games.
We also have a Fifth Edition SRD that is sorted by an extensive index or by topic. We're very proud of it but we're also looking for constructive criticism.
We have a wiki for RPG brainstorming and personal campaign management, however, it's private and requires approval to use.
Many of us hang out in the IRC channel #texasxtremerpg on freenode.net. IRC stands for (I)nternet (R)elay (C)hat. It's an old-school way to chat online and is completely free. Another great channel for RPG fans is #D&D on freenode.net as well.
You can either connect with an IRC client of your choice; or, you can use this handy webchat link if you are new to IRC and just want to take it for a test drive. Hexchat is a good client for someone new to IRC.