showing an RSS feed(s) in the margin of a blog

In the last few days I've seen something about a new service that makes 
it easy for blog owners to drop an RSS feed into a margin column. 
Something like a blogroll. Now I can't find it again.

The target is a typepad blog for someone who wants to take a set of 
feeds of posts they make on other platforms and drop it into a typepad 
margin.

Anyone got ideas on how to do this?

ps. Perhaps it was "FeedRoll".

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Julian Bond Email&MSM: julian.bond at voidstar.com
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