This looks pretty good, and will hopefully do away with the austerity of Fight Night Round 3 as a more "thrilling" realistic boxing title.
There's a fair amount to see in here, including training mini-games as well as some proper Rocky-style bang-bang. Gamespress is only listing this as Wii and 360 for "spring 2008", so we'll have to check that. There's a press event for it in London next week, so expect to see more very soon.
Trailer after the link.