As everyone delves into CSS, I’d like to suggest some software that helps. Aside from VI in Terminal and Notepad, CSSEdit helps make it easier to develop CSS: http://macrabbit.com/cssedit/ (I fell in love with this after converting to Mac)

On PC, I recommend TopStyle: http://www.newsgator.com/Individuals/TopStyle/Default.aspx

As far as editing HTML, BBEdit is my dream-software: http://www.barebones.com/products/bbedit/

Dreamweaver is too hefty, and has a ton of extra stuff you usually don’t need. Try opening Dreamweaver, Photoshop & Parallels (for IE) at the same time with 2GB RAM—not so great.

And of course, Firebug (Firefox) is ESSENTIAL. CSSEdit has a tool like Firebug, but you can’t edit HTML in real-time as you can in Firebug: https://addons.mozilla.org/en-US/firefox/addon/1843

( another helpful extension (Firefox) is the Web Developer Toolbar: https://addons.mozilla.org/en-US/firefox/addon/60 )

Finally, you’ll find more use from this tool than you think for IE debugging (PC), the IE Developer Toolbar: http://www.microsoft.com/downloads/details.aspx?familyid=e59c3964-672d-4511-bb3e-2d5e1db91038&displaylang=en