Clarification of Reader and Roller storage

Can someone clarify where the rss data is stored for the reader and roller
features?  I assume the reader information about the blog properties (URL, name,
folders created by the user, etc.) are all stored locally on the CS database,
but then I would hope the content of those blogs are NOT stored locally on the
server.  The roller, I assume, would likewise just go get the data when needed
(perhaps cached for some time)?

Thanks,

Mike Wood

The roller list is stored in the database table: FeedPost. I believe the reader
delete rows as new are aggregated (as it approaches a certain maximum or within
a certain daterange).

 But yes, the blogs are stored on the server.