Earlier quoted context omitted.
That seems to be what's happening at the moment. I initially assumed this announcement would cause a panic sell-off, instead it seems as if a lot of users are now converting their USD back into BTC in light of the hiatus. The exchange rate has ticked up pretty steadily as a result.
If it was just a MtGox only issue, then bitcoins on MtGox ought to be at a premium compared to the other exchanges. But if you look at http://bitcoincharts.com/markets/ it seems like MtGox is perfectly in line with the other markets - within half a dollar of Bitstamp and actually cheaper than BitBox etc.
In an unrelated note, big fan of your site.