Delicious, Reddit & RSS.

Hi,

My site is new, have not taken any efforts to connect to the blogosphere, yet I have emails from people who found the site on Reddit and Delicious.
How come they are already seeing my site? Not necessarilly a bad thing..., but I'm curious.

Can you help me find out what is happening and when I'm ready how get RSS working for me. I will need to be able to get feeds and provide feeds. By "provide feeds" I mean to get my posts listed out in the blogosphere and by "get feeds", I mean get content posted on my site for from releveant sites providing RSS links.

I think need an intro into RSS for BP and WP-MU.

Kind Regards,
Larry