sorry I don't know anything about data lines shortened - I'm wondering if you know about
http://www.amazon.co.uk/Sony-PlaySta...pr_product_top
it's got two usb ports as far as I can see, though you probably need to buy a mains lead. Would its data lines shortened to fit the PRS 650? I live in the middle of nowhere and I won't be in town before April. Amazon sellers tend to get back to me with a "this device hasn't been tested" standard answer...