Actually, with Dreamweaver, the search and replace tool is multi-line (Making it actually useful). Also, you can search through: Selected Text, Current Document, Open Documents, A Folder, Selected Files In Site, and Entire Current Local Site. So yes, even though they are simple things, they are helpful. And yes, you do have a point with XHTML 1.1 I suppose.
That is a nifty feature, but not one I'd use a lot, just something thats good to have. I rarely use search anyway, so...meh.