ciml - 8:02 pm on Sep 27, 2003 (gmt 0)

www.brandkeyword.com only matches for www, brandkeyword, and com, so it's no use for brand, except that people are very slightly more likely to link to you as "Brand Keyword".

www.brand-keyword.com does match brand and keyword, but the difference is too small to worry about IMO. Yes, you might get some links for www.brand-keyword.com but I wouldn't worry about that any more.