Presently, there is no way to do that, except to use USART with the putchar function, but it is not comfortable.
A new tool will be soon available, with the next version of RKitARM in association with the new Primer (EvoPrimer) : the ARM Serial Wire Viewer has been implemented, that allows to do some "printf" in your application, to send information through the debug tool chain, and display it in specific Ride7 views.