I wouldn't be so quick to write this off.  I wasn't having any issues with Bitinstant until recently.  My last 4 orders have taken days to get through and I've been completely ignored by their staff. 

I understand the frustration since I don't know what to do at this point, either.  I've been writing their support team (politely) since last Wednesday and I have gotten two responses (out of several messages).  The first ticket was apparently opened by Rachel last week, but nothing came of it-- no coins and no follow-up. 

A second ticket was opened (by Seth) and their was still no follow-up and no coins.  I am still missing close to $1,000 worth of money and losing my own customers and no one seems to care.  I really just want my funds and go somewhere else.  I keep giving them a try but this happened to me on 12/10, 1/28, 1/29, and now 2/14...  The one and only time this was fixed quickly (in under 3-4 days) was on 12/10 - I talked to Rachel on the phone, panicked because I was missing close to $1,500 and she pushed it through within hours.  Based on the declining service I've been experiencing, I also believe that there is something going on and the business is not stable.  For me, they have been keeping my money and releasing it 3-6 days later!

I will update my post when this gets resolved.