I've been to a number of Internet / Search conferences but my favorite is always PubCon. It offers sessions on Search but goes into greater detail on Social Media, Video, Domaining, etc... than other conferences. The best part is that PubCon is cheaper than most of their competition especially if you register early.

By far the best conference for people who earn their living on the Internet. From SEO to social networking, domaining to design, there's something for everyone. Site reviews by search celebrities are helpful not just to the site owners but for the audience members as well.

My favorite Internet conference. WMW is for the guerilla webmaster. You will learn tips here that you just won't find at the bigger, corporate conferences - especially if you have the endurance to close out the hotel bar. Great keynotes (John Battelle, Malcolm Gladwell, etc.), solid sessions, and fantastic after hours networking.