As a part of the book, I interviewed Sahil Laviniga, the founder of Gumroad. He invests a little on the side, and he told me that a bad name is a bad sign. From the transcript:
I think a name is actually quite representative of the long-term commitments of the founders/ founding team. A name that sounds ridiculous or uses an uncommon TLD may seem throwaway and imply a lack of product sense. Founders should be picking a name with a long-term potential.
Fred Wilson also wrote about domain names at http://avc.com/2011/04/finding-and-buying-a-domain-name/
I believe that a good domain name is an important success factor in building and launching consumer web services. It's not in my top ten but it could be. It's certainly something we think about a lot when making investments and working with companies post investment.
So for at least two investors, the name definitely matters.
If you're looking for specific examples, look into Wesabe (lost to Mint) an Fukime (no longer exists). In general, a good name won't make you successful, but a bad name will hold you back.
More reading on Mint vs. Wesabe: http://kcovia.com/why-mint-beat-wesabe/