Can someone help me ... do I need bitinstant before opening up an account with mt.gox?
If you're planning on buying/selling through MtGox you're going to need some kind of way to get funds into it.
I believe there are several that you can use, but as of yet haven't used any of the options.
I am waiting for my Dwolla account to get some funds transferred then going from there.
I think the approach I'm going to take is to purchase privately from some trusted source on here.
Building trust is my next step.