[Rails] help: adding RSS feed to the post using ruby on the rails

Hi
I want to know if I want to share a post through RSS (e.g. in Google Buzz), what should I do and how could I start?
If possible please let me.
Please provide me some useful links if possible.

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Thanks,
Irfan Ahmed Rizvi
http://www.welltreat.us
+880 1676  246  991
+880 1723  712  288

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