heartbeat under Ultra Monkey and Piranha, Mon stability

[Miri Groentman <mirig@xxxxxxxxxxxx>]

Hi, 
I have to decide what clustering software to use. I have two questions: 

1. I know I can run heartbeat on two nodes using LVS, and on up to 8 nodes
using failsafe. How many nodes can run heartbeat under Ultra Monkey, and how
many nodes can heartbeat under Piranha? 

2.How stable and reliable is Mon? I want to use it, but it never reached
version 1.0, and it is sometimes referred to “under development”. Can people
experienced with Mon tell me how reliable it is? Al opinions will be highly
appreciated. 
Thanks 
-Miri