Recursive Selects

Hello All,
 I wanted to know whether recursive selects are supported in the latest version
 of postgres. I checked out the unimplemented sql constructs and came to know
 that "with recursive" is supported in 7.3, but i could not find any documentation
 for it.
 Actually I have a DB containing the adjancency list (ie tuples of type node1 node2 where
 the graph has an edge between node1 and node2) for a graph. Now given any node
 i need to find out all its neighbours till a depth of say 5. Hence i need a
 recursive select (to avoid giving individual selects as it might take longer
 and i am concerned about speed).
 Sorry if this is a repost, but i could not find much info in the archieves.
 Any help would be appreciated.
 TIA
--
Varun