> Q1) Slony-I on Windows is stable? 
> A1) Yes. I have been using Slony-I v1.2.16, and I assure you it is stable on all platforms.
> 
> Q2) Slony-I master on Windows can be replicated to slave on Linux/UNIX
>    host?
> A2) Yes. The platform/O/S is not important for replication. It is important that the versions of Slony-I 
>         be identical.
> 
> Q3) Is it possible to replicate a database "A" on master node to slave
>    as database "B"?
> A3) Yes. Slony requires you specify the master and slave database names, but the names may be 
>     different. What is critical is that the same schemas and tables exist on both.
> 
> Q4) If 2) is yes, then is it possible to replicate mutiple master nodes
>         to single PostgreSQL database cluster? For example, 
> A4) Yes, but you will need a separate slony schema and slon process for each database replicated.

Thanks Melvin! Your answer is greatly helpful.
--
Tatsuo Ishii
SRA OSS, Inc. Japan