I just message the dev of
http://CryptOTC.us to add Gridcoin and he did. The site is still in beta so everyone can go ahead and give it a shot and see how it works.
Do you know who the dev is? These exchanges pop up and disappear with peoples money all the time. I'd wait for either bter or cryptsy or possible coins-e.
Agreed. I don't trust to new exchanges. But... I will give it a chance with little quantities of cryptocoins.
*** EDIT ***
Oh... It's not exchange actually. It's like our Google Docs sheet - list of offers. Nice, i will try.