Dave Winer says...
"With much of the UserLand mess settled, I’ve been having thoughts about doing more products, but then things pop up that remind me that it’s not as simple as just creating a product and marketing it, there are always people who show up wanting to take what you created for themselves."
Source: Scripting News for 6/9/2007 « Scripting News Annex
After reading this, I have one word for Dave, RSS.