sieve upload/download mechanisms

I'd like to know what mechanisms server vendors have implemented for sieve 
script upload/download.
I'm aware of systems that use ACAP, HTTP, FTP, LDAP, and CMU's managesieve. 
Are there any other means of doing this? Would it be possible for server 
vendors to describe in some detail how their implementations work for 
interoperability? I wonder if there should be some BCP document about this?
The problem is that as a client vendor I need to know how to get scripts 
uploaded/downloaded to the various servers. I'd rather not have 
half-a-dozen variants to deal with, but that looks as if it is the case 
right now.
--
Cyrus Daboo