Some people on here really ought to STFU--their opinions are worthless because they have no fricking idea what they are talking about with regard to the consumer Nikons like the D5000.
Not sure if this was directed at me or not, but given that it was just after my post, I will assume that it is.. I never said that the D5000 isn't capable of decent jpegs as proofs, I was arguing the misleading notion that just because many pros print on site, that this must mean that its a wise thing to do and that anyone can do it with a D5000 and limited skill set ( not meant to be a dig at the OP )
Besides, its a free world, you can show people whatever the hell you want. Snap some test shots with your iphone and give your customers those. Its your business and its your call. I think the OP has been given some honest feedback from both sides of the spectrum, so there isn't much sense in debating it into the ground, it now boils down to the OP making a decision. There are pros and cons of any decision.
PROS: less work, less time consuming
CONS: potential to harm reputation, potential to drive away customers.
Also, keep in mind that people usually would prefer not to know the truth. What I mean by that is, when you shoot someone with a bad complexion or whatever that needs some blemish removal, showing them the unedited ( even if processed in camera but no skin smoothing or cloning/healing done to blemishes) and telling them "I will remove the blemishes, can be not only insulting, but upsetting to the customer. It is much better for them to see the finished photo and feel happy, not realizing that you actually toned down their flaws a bit. That customer is going to go away thinking you are great, not because your composition was good and your colors popped, but because you made them look good. I mean at the end of the day, isn't that what portrait photography is all about?