RSS Feeds Next To Forum - Adding RSS into a style

I've been thinking about adding some "interesting" content to the left and right side of a Forum X.

Now I have this kind of information in the form of RSS feeds:

http://random.com/rss.xml?cat=3&num=10&direct

   (cat = categorie   ;   num = number of results to be shown....

How would people recommend I input something like that in a clean way?

I know how to get flash objects or gifs next to my forum, but how do I add RSS into a div or .... ?

Any help appreciated.

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I can also imagine this as a extension...

Say you have a website and want news from other sites appearing on the left and right, that can be useful to users....

Then ideal would be to be able to just have a form in the admin section: [paste rss feed] [choose location; i.e. left right top bottom]

look forward to ideas