Marc Fest has a list of a thousand domain names that no one has taken yet. some of them seem pretty cool. Apparently he did it using a small program he wrote.
What's missing? The program code itself would be cool to see.
Also - he didn't try to put the words “dotnet“ in there :(
but some are cool : causinghurt.com, comingbackformore.com, destructbutton.com , giveitarest.com