Campy 10 to 11 requires no re-dish. However, most wheel companies do require a re-dish to go from Shimano to Campy. There are a few exceptions. Zipp and Fulcrum come to mind. Spinergy as well if I'm not mistaken. They dish all of their wheels for campy and have a larger gap between the frame and freehub when shimano freehubs are installed. Other companies, such as HED for example, prefer the not to have that large gap and therefor, shimano wheels are dished for shimano and campy wheels are dished for campy.
And Mavic, any one who uses DT as well as Campagnolo. So basically the major players have designed their wheels to work either way. The rest are either micky mouse wheel manufacturers whose designs are a little half assed or, in the case of Shimano, so big they have no interest in cross-compatability