If you’re interested in putting your family tree online, there’s only one way to go–PhpGedView. Most genealogy programs will export to the common GEDCOM format and aside from a webserver that supports PHP, that’s all you need. In fact, if you.re just getting started, you don’t even need a GEDCOM file, you can create it from the web interface phpGedView provides.
The project is Open Source and has an active team of friendly developers headed by John Finlay. After the research I’ve done, it.s the only good way to graphically display your family tree online in a usable, dynamic format.