I made a post on the forums as I have not gotten any response from bitinstant in the last 24 hours.  I made a withdraw from mtgox via a code to bitinstant to transfer to paypal.  My mtgox code was "cashed in" but the funds did not appear in my paypal.  There was an error in the API response string that stated INSUFFICIENT FUNDS

I still have no refund in mtgox or deposit into my paypal, and no response to my email or 'live' chat thingy on the website, which pretty much just submitted my question and said I would receive a response in my email (so much for 'live'?)

I would BEWARE of using bitinstant at this point as it doesn't appear transactions are going through.  Sadly, my transaction was worth a lot of USD.. which is why I'm so focused on getting this issue resolved, with zero response coming from bitinstant in regards to this issue.

As I said, BEWARE!!!