Marketpress Overnight / 2-Day Shipping Options

As we are getting closer to Christmas, we're getting more and more of our customers asking us about priority mail and overnight shipping options. To date we have been shipping everything first class.

Is there a plugin for marketpress that would connect with USPS to determine what the rate should be for those shipping options and then mark them accordingly with the order?

What about Fedex and/or UPS options too? We prefer to stick with USPS, but I know some people prefer private shipping due to the reliability they offer.