Why would you want to do this? Do you lasso people with your keyboard? I would read Ripster's USB wiki before considering this mod. That said, if you plan on doing this mod, I would also consider making the cable removable. Here is a link to a great replacement cable: http://www.monoprice.com/products/product.asp?c_id=103&cp_id=10303&cs_id=1030301&p_id=5438&seq=1&format=2 (http://www.monoprice.com/products/product.asp?c_id=103&cp_id=10303&cs_id=1030301&p_id=5438&seq=1&format=2). These are freaking water hoses, they're dirt cheap, and great quality. I use them on my HHKB, and they come in all different lengths and USB connector types.
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Ditto on that. I don't know how monoprice does it, but their stuff are EXTREMELY thick (might be too uncomfortable for some). I got a US$8 DVI cable last 3 months ago (their most expensive one - premium) and it was AS THICK as a water hose. The ferrite core was extremely solid.
And yeah, I got a few shorter ones for my HHKB.. extremely durable.
Funny thing is, all of it is made in china and it's real good quality at a really low price. Nothing to complain except that I hate UPS. Monoprice will NOT SHIP outside of US of A except using UPS and I was charged a 'custom import' fee of US$80 for a US$150 order (including US$75 shipping), when the custom clearance form obviously shown that I was not charged anything at all.
Really pissed me off - UPS that is. Monoprice is freaking great on the other hand.