Thanks lot ed.
Point very well taken. Same thing happened to me.
There was a company called www.riya.com who hyped lot before launch. They were building some image comparison and search technology. I saw there demo on demo.com and signed up for beta. I was following their blog everyday and waiting for release.
When release actually happened, the product was POS (Piece of Sh..)
I never visited riya.com again ever.