Penny Arcade Expo (better known as PAX) will be headed to Texas come January 2015 for their PAX South weekend.
Tickets are currently on sale at $30 a pop, and though 3-day badges are sold out, individual days are still available. Tickets tend to sell out very quickly, so if you're interested in going this year, you should register immediately at on the PAX website.
To prevent scalpers from reselling tickets for 10x the face value, PAX-goers can register up to four tickets per transaction. So if you want to attend with friends, they should register on their own with their own credit card to prevent your transactions from being flagged. Suspicious transactions will most likely be canceled.