More info will be revealed at the official site as it becomes available, but for now here's the official QuakeCon 2K8 announcement:

As temperatures begin to rise it's time to start planning the ultimate summer vacation to THE must-attend gaming event of the year - QuakeCon 2008. That's right! The world's greatest gaming festival and party will take place July 31 – August 3, 2008 in Dallas, TX at the Hilton Anatole Hotel. As always, this event is FREE to all attendees thanks to the support of the QuakeCon volunteer staff, id Software, the event sponsors and exhibitors.
QuakeCon will once again host North America's largest BYOC (Bring-Your-Own-Computer) LAN party, as well as an expanded exhibit area with nearly 60 companies demonstrating their latest products. Of course, it wouldn't be QuakeCon without highly competitive tournaments for serious cash and bragging rights, parties, contests, entertainment and announcements.

read more info here:
http://www.quakecon.org/

heres a little taste of last years event

http://www.youtube.com/watch?v=u-L4IloV44g&feature=related

yea, i have to agree with that opinion!  why play quake wars when BF2 is so much better.