I felt something cool about Rac one node database and i am sharing my experience here.
We have a 2 node Sun Sparc cluster with 11.2.0.3 with one active and other one being passive, Suddenly one fine day we saw the Instance switched to node 2 and my colleague was fighting hard to find the reason for the node switch and raised a SR with oracle and then we later found the /oracle installed direcotory was completetly exhausted and node swithced...
But this is really a cool feature of Oracle 11G.
