Today, I got a excellent site and which should be useful and famous for Social Search Engine. From one place, you can search Twitter.com, Jaiku.com, Pownce.com and also on full web. I search and got some interesting news too.
One thing, from twitter you also get the latest news of Information and Technology becasue evey second people twettering. And on Jaiku also useful too and you can manage your channel for same interested topics. Pownce.com now publicaly opened, so no worry you can anytime get any information to search pownce.