John Abbott of Texas has done a lot of updating on the Odonata Central web site. Especially cool is his photo gallery of odonata from South Africa from a trip he took earlier this year. Some species are fairly ordinary, but have great names like Pinhey's Whisp, Phantom Flutterer, and Jaunty Dropwing. Others are just wonderfully exotic-looking, such as the Dancing Jewel and the Pintail.
Other great tools John has added include a huge, searchable literature database, online versions of the Dragonfly Society of the America's two publications, the Argia and Bulletin of American Odonatology, and an archive of all the odonata listservs. I've added these links to my sidebar.
Be sure check out these fantastic resources.