Terms: revLet, webLet?

[Eddie]

There have been a number of posts using these terms, but after looking 
at several of the messages I cannot determine what is being discussed.  
A search for the terms on the www.runrev.com site does not result in any 
hits.  Are these two terms synonyms for the SAME thing?  Some of the 
messages seem to infer they are discussing the server based offering 
that accompanies the OnRev hosting solution, while others seem to infer 
they are discussing the plug-in technology that is forthcoming in the 
4.0 release.

I am confused...