Can any current consumer grade computers mine any alt coins? I'm interested in mining and would like to know if there are any consumer grade computers available that can mine any of the alternative coins. If so, what computers and which coins do you think would work fairly well?
As mentioned almost any is able to mine coins - the question just arises about profitability.

There are some mining pools, that offer to switch the coin mined automatically depending on which coin is the most profitable at any point in time.

Examples of those pools are:


Multipool.us
Middlecoin.com