Right now the main factor before everything else would be the volatility of BTC. If you have an hourly rate, how do you convert it to BTC considering the values goes up(and down) in solid percentage points and during the course of a single day. So if you're up for the risk, then try it out.
But personally i don't see any benefits over just asking for money in USD(or whatever currency) over paypal.
I would consider offering a discount of sorts when paying via bitcoin, or setting a fixed conversion rate (right now something like $120 per BTC has been fairly stable).
But I agree, there's nothing to prevent me from accepting the money via normal means, and simply buying my own bitcoins.
But personally i don't see any benefits over just asking for money in USD(or whatever currency) over paypal.