I have been playing MKDA on the gamecube version. I also have the X-box version. I feel that the gamecube version is neat, but is slower when it comes to the krept. You have to wait for the memory card auto save feature to save everytime you open up a coffin. The X-box just opens the coffins immediately. Also when traveling the globe, the gamecube will stop every now and then and save the game automatically. The X-box version of the game never has a screen that pops up and says, "Saving to memory card....blah blah blah."
I still think the X-box version is much better. However, I can't speak for the playstation 2 owners, because I don't have that version.
Anyway, everything looks nice around here in the MK5.org website. Good job!