The USB port is rather annoying. Takes me some time to figure out where to plug in the stick, because the port is on the back of the Gaia - and I'm in front of it. Sometimes I even get a small electric shock. Which is OK for me but I care for my synth.
Today I found a nice peace of hardware. Since I live in Germany, the link directs to a german website (Conrad Electronc), but you can check out the picture: It's a 4 way switchable USB hub:
http://www.conrad.de/ce/ProductDetail.html?hk=WW4&insert=V0&WT.mc_id=Froog&productcode=973813&utm_source=google&utm_medium=deeplink&utm_content=dl_article&utm_campaign=g_shopping
I'm sure you'll be able to find something similar somewhere in your country or on the net.
Works quite good and needs no external power. Just make sure you turn off the active USB stick before you switch to another one. Sometimes the hub acts kinda weird if turn on multiple sticks.
Apart from that little problem it works excellent.. You can load the patches and data dumps and even use the USB patch feature.
Price is 15 EUR, about 20 USD. I'm using 1 GB Transcend USB sticks.