ERS now offers the HOT CEntrance MicPort Pro
portable USB mic preamp.  Don't suffer with a typical USB microphone
when you can have a very high quality mic preamp w/48V Phantom power,
headphone amp with zero latency monitoring, and 24bit/96khz sampling
rate A/D converters.  It weighs about the same or less than most cell
phones, and is completely plug and play with Mac and Windows
computers.  Think of it as an Mbox stripped to the bare essentials, that actually sounds BETTER, and takes up less space than your microphone. 

Use
it with almost ANY professional microphone with an XLR connector.  You
don't even need a mic cable with most mics!  It's a ONE CABLE recording
solution for your computer, requiring just the included USB cable.  You
can install the CEntrance Universal driver
for Windows XP and Vista SP1 to give you more control over the MicPort
Pro, such as sample rate and latency settings.  Use it to record audio
into your favorite recording software on Mac or Windows (almost
everything but Pro Tools, of course).  Throw it in your laptop bag with
a mic and a small desktop mic stand and record whenever and whereever
the need arrises.