JD Lasica’s SocialMedia.biz blog has a post, 2009 conferences: Social media, tech, marketing, that lists “some of the best social media, technology, media and marketing conferences for the upcoming year” in the US. The list doesn’t include any technology research-oriented conferences, but does have quite a range of others. The post invites everyone to suggest additional entries by adding comments about them. (I suggested ICWSM and the AAAI Spring Symposium on the Social Semantic Web.)
This list complements Akshay Java’s Social Media Events calendar which is focused mostly on research conferences. He also invites suggestions which you can submit by email or through comments.