colorful new USB hubs
are available in 2-, 3-, and 4-port designs that are specifically constructed to prevent having one device block off multiple useable ports. The 2-port design is T-shaped, while the 3- and 4- port designs are cross-shaped. The short USB cables on the ends make these ideal for travel situations.
No price or availability yet, but I’d suspect these’ll be pretty cheap. As to whether or not you’ll be able to find them outside of Japan, well, I hope so. I’d love a pack of these for my next cross-country trek.