S Corp. My CPA went through everything with me and decided $$$ wise for me, it's the best arrangement. I pay myself a relatively small salary which I pay SS and Medicare taxes on. All income I have to pay state and federal income tax on (unearned income) but this gives me some leeway on what I'm putting into SS and what I'm using to invest on my own. I think right now my SS statement shows me getting something pathetic like $500 a month when I retire - I'm better at investing my $$$ than the government is ;)
BTW, a tax attorney friend of mine also OK'd this so don't tell me I need a new accountant
