My area of interest is about HCI and visualization. There are three major annual conferences on this field.
1. CHI

The ACM Conference on Human Factors in Computing Systems (CHI) series of academic conferences is generally considered the most prestigious in the field of human-computer interaction. It is hosted by ACM SIGCHI, the Special Interest Group on Computer-Human Interaction. CHI has been held annually since 1982. CHI 2009 will be held in Boston, Massachusetts, USA. In 2009, the organization of the CHI program committee is divided into topical subcommittees including: Improving Usability; Specific Application Areas; Interaction Beyond the Individual; Design; Interaction using Specific Capabilities or Modalities; Behavioral Study and Theory; Technology, Systems, Tools, and Infrastructure; Interaction Techniques and Devices; Interaction in New Contexts.
2. UIST

The ACM Symposium on User Interface Software and Technology (UIST) is the premier forum for innovations in the software and technology of human-computer interfaces. Sponsored by ACM's special interest groups on computer-human interaction (SIGCHI) and computer graphics (SIGGRAPH), UIST brings together researchers and practitioners from diverse areas that include traditional graphical & web user interfaces, tangible & ubiquitous computing, virtual & augmented reality, multimedia, new input & output devices, and CSCW. The intimate size, the single track, and comfortable surroundings make this symposium an ideal opportunity to exchange research results and implementation experiences.
3. SIGGRAPH

Special Interest Group on GRAPHics and Interactive Techniques (SIGGRAPH) is the name of the annual conference on computer graphics (CG) convened by the ACM SIGGRAPH organization. The first SIGGRAPH conference was in 1974. SIGGRAPH is widely considered the most prestigious forum for the publication of computer graphics research. As of 2008, SIGGRAPH conferences was also held in Asia (SIGGRAPH Asia), in addition to the conferences in the United States. In 2011, for the first time ever, the main SIGGRAPH conference will be held outside the United States - Vancouver, Canada.
1. CHI
The ACM Conference on Human Factors in Computing Systems (CHI) series of academic conferences is generally considered the most prestigious in the field of human-computer interaction. It is hosted by ACM SIGCHI, the Special Interest Group on Computer-Human Interaction. CHI has been held annually since 1982. CHI 2009 will be held in Boston, Massachusetts, USA. In 2009, the organization of the CHI program committee is divided into topical subcommittees including: Improving Usability; Specific Application Areas; Interaction Beyond the Individual; Design; Interaction using Specific Capabilities or Modalities; Behavioral Study and Theory; Technology, Systems, Tools, and Infrastructure; Interaction Techniques and Devices; Interaction in New Contexts.
2. UIST
The ACM Symposium on User Interface Software and Technology (UIST) is the premier forum for innovations in the software and technology of human-computer interfaces. Sponsored by ACM's special interest groups on computer-human interaction (SIGCHI) and computer graphics (SIGGRAPH), UIST brings together researchers and practitioners from diverse areas that include traditional graphical & web user interfaces, tangible & ubiquitous computing, virtual & augmented reality, multimedia, new input & output devices, and CSCW. The intimate size, the single track, and comfortable surroundings make this symposium an ideal opportunity to exchange research results and implementation experiences.
3. SIGGRAPH
Special Interest Group on GRAPHics and Interactive Techniques (SIGGRAPH) is the name of the annual conference on computer graphics (CG) convened by the ACM SIGGRAPH organization. The first SIGGRAPH conference was in 1974. SIGGRAPH is widely considered the most prestigious forum for the publication of computer graphics research. As of 2008, SIGGRAPH conferences was also held in Asia (SIGGRAPH Asia), in addition to the conferences in the United States. In 2011, for the first time ever, the main SIGGRAPH conference will be held outside the United States - Vancouver, Canada.

I hope you'll be able to publish in your venues pretty soon.
My first, nice comment! Thanks, Rachida!