Phosphor,
That was true in the past (though not to the extent many would have you believe) but is no longer true. If you are using asp or asp.net then yes, it "spits out proprietary code" but under those circumstances, so does PHP. I’m no fan of FrontPage but it’s not as bad as you claim it to be and leaves me to believe that you haven’t used it at all (at least lately) and you let others think for you by parroting their uninformed comments. Now, don’t confuse these comments with support of FrontPage, I do not, nor would I recommend it for professional web development.
By the way, Microsoft has another web development tool in the works; Microsoft Expression: Web Designer <
http://www.microsoft.com/products/expression/en/default.mspx>. You can download a beta from this link. The one problem I’ve discovered with it (and the reason I’m using Visual Web Developer 2005 Express to investigate more about asp.net) is the lack of an integrated asp.net editor. You can add the components but you can’t (or I haven;t discovered how to yet) connect them or really do anything beyond layout tasks.