I am new to the Bitcoin arena, but I have accounts for trading USD <-> BTC with both MtGox and Bitfloor. As you're likely aware, Bitfloor has bit the dust and many of us are still trying to get our USD funds back (BTC are already written off, sadly). FWIW, my advice based on the very protracted, painful, and frustrating bitfloor experience: be patient and watch forums here on bitcointalk closely.
I am fascinated by the emerging currencies such as BTC, but my perspective has been that there are a lot of both good and not-so-good folks out there trying to make things happen in the Bitcoin world. So, I hope MtGox will start speeding things along for you, but hopefully you will get your money and in the mean time I hope you will not become too stressed/frustrated with the process.
Last point, I think a lot of folks are settling in on MtGox after Bitfloor dibacle, and all this activity could be complicating matters too.
Best wishes!