Persistent storage / forwarding of events

First questions. I should preface this by saying that I'm mostly 
investigating using mod-pubsub for asynchronous messaging, things like 
email or newsgroups or blogs where a recipient may not be online at the 
time a message is sent. So:

(1) Do topics have the capability to store-and-forward events? If I set 
up a route from a source topic to my 'journal' topic, and then 
disconnect, will the journal queue up the incoming events as a POP 
server would, letting me reconnect later and receive the events I've 
received in the interim?

(2) Can topics store their events persistently so they can be retrieved 
later by clients that connect to them? For example, a topic might 
implement a newsgroup, and a new subscriber would want to be able to 
download the existing posts, or at least the last hundred or so.

If this isn't built-in, would it be straightforward to build a solution 
on top of mod-pubsub, or would this be a bad design choice, attempting 
to force it to do something it just wasn't meant to?

--Jens



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