GotoMeeting *Relatively low-cost web conferencing solution that works for small gatherings (less than 15). Best part may be its 30-day free trial!
Microsoft Office Live Meeting *Offers easy to use online conferencing capabilities employing online presentations with telephone interactions.
SiteVisit *Offers searchable database for locating venues for business meetings. Search feature allows for search on several criteria including geographic location, meeting room size, facility type, price range and more.
WebEx *Another major service for web-based conferencing.