Newbie question about agents

[Christopher Davis]

How do ya'll go about finding agents? Do you have multiple agents working for you? I could see that being frowned upon but I don't know. 

Also, do residential agencies have buyers lists like commercial firms do? For instance, if I call and say, "I'm looking for X in X area at X price, let me know if you ever find anything", do residential real estate agents do that? 

One more: I'v been thinking that finding a young go-getter type of RE agent might be the best route because they will work their butt off, any thoughts?