Fabs and Digital are right, but if I get what you are saying, you will certainly be able to shoot with slower shutter speeds than you can hand held.
There is more to using a monopod than meets the eye. There are a number of techniques you can use to significantly improve the stability of a monopod (there is a tread on here about it somewhere) and I now find I'm using a monopod far more than I use a tripod.
You can jam it up against walls and fences, hold it against you trees and, by leaning on the monopod, you can sort of create a tripod effect by using your own legs as the other two legs of a sort of half human tripod.
Whilst I agree that they are obviously not as stable as a tripod, they are far more versatile and I suspect you will get more use out of a monopod than you will a tripod. I certainly do.
I use a Manfrotto 685B with a Manfrotto 234 head. Wouldn't like to be without it.