WebDAV really does work when setup correctly, so there is something in your Domino configuration that needs to be changed. Start by checking these:
If you use a proxy, start IE and confirm that the tools/Internet Options/Advanced/Use HTTP 1.1 through proxy connections is checked.
Is the url you are using "http://your60serverhere/webdavtest.nsf$files"?
Make sure you are really getting to an Domino 6 server.
Make sure that the option on that Server's Basic tab to "Load Internet configurations from Server\Internet Sites documents:" is Enabled.
Double check the Internet Site doc - quoting the doc "make sure you do not do the following:
- Configure URL redirection.
- Enable the "Redirect to SSL" option.
- Enable session authentication on the Web Site for which you have WebDAV enabled.
- Create a File Protection document for the Web site that restricts access to the HTML root directory. "
After that, walk again through the instructions in the Designer's help on setting up WebDAV for your particular database, and it really will work.
I don't use Dreamweaver - I am using MS Word as my WebDAV client on XP - but I do remember reading that there are some special directions pertaining to Dreamweaver setup..
Good Luck!