One of my favorite conferences for general marketing is put together by the eMarketing Association. I've been attending and speaking at this gathering for many years. It's a small, intimate event that does a great job of covering a wide range of current topics from the world of online marketing. I can readily recommend this conference for anyone new to emarketing as well as those who are experienced and looking to brush up on the latest and greatest in the industry today. You can check out the eMA's Web site to learn more about the upcoming eM7 conference in Atlanta October 23 - 24, or its conferences in 2008.
P.S. I really don't get paid for writing this or for speaking at the conference. I just like the what it offers.