Story here: http://www.dailytech.com/article.aspx?newsid=2227
To summarize, they've upped the L2 cache to 1 MB, it's a 4-way set-associative single core, and it can be clocked to 1.1 GHz, although no word on the actual clockspeed in Wii. They mention at the end that the GPU is from the R520 family, but I think that's because of that "RN520" name that was floating around a little while back. But since that originated with Han_Solo's lies, I don't put any stock in it.
To summarize, they've upped the L2 cache to 1 MB, it's a 4-way set-associative single core, and it can be clocked to 1.1 GHz, although no word on the actual clockspeed in Wii. They mention at the end that the GPU is from the R520 family, but I think that's because of that "RN520" name that was floating around a little while back. But since that originated with Han_Solo's lies, I don't put any stock in it.