Just received the following in my inbox ... such sad news. You will be remembered fondly Flock - we at Socialsprouts are so very sorry that it had to end this way.
Flock Official End of Support Notice
Support for Flock browsers will be discontinued as of April 26th, 2011. We would like to thank our loyal users around the world for their support, and we encourage the Flock community to migrate in the coming weeks to one of the recommended web browsers listed below.