Forum Moderators: open
Although you asked about a WYSIWYG editor, I would strongly recommend editing your files by hand, especially if you plan on doing web design for any non-trivial amount of time. It may ba harder intially, but it will save time further down the road.
If not, have a look at Nvu - it's Open Source.
Welcome to then forums, Web_dr!
I'm just one of may web professionals here, and there are many more talented than I. Spending time here has taught me a ton (I think that's the correct tehnical term), and I'd certainly recommend taking the time to peruse the forums in depth. Please share your own insights with us well.
So when you make your decision of which editor to use, post and let us know which one you decided on and why. You'll inform those of us like me who tend towards code-by-hand over WYSIWYG.