single node feature

"lvs" has a feature that allows for one director with one real server where
if the real server is busy, then the director can take over ( I have not 
seen
this working yet). Does piranha support this? And if it is supported, would
it then be possible to setup a secondary node (and or the primary node)
as a real real server as well? The reason for this : I currenlty have 2 
machines,
and there may be more in the future, and I would like, if possible, to avoid
changing to from a fail over configuration to lvs once there are more 
machines
available.

P.S. Is this a bad idea?