hah, I mean I love Kagawa. He was incredible during the Asian Cup - he always puts in a MOTM shift in the Samurai Blue, and his contributions for Dortmund have been immense, too.
I even have him as my "arena player" on Fifa 12.
I'm just saying, you can bet your ass that a player of his quality is under surveillance by every top club in the world. The fact that there's no news about a transfer for him means a few things:
1) he or Dortmund are quietly rejecting transfer requests
2) he or Dortmund are quietly negotiating on a transfer
3) he isn't seen as a sound investment for a PL club - there are only a few clubs that would utilize a player like Kagawa, and those that would use him, namely Arsenal, are not in the market for players that cost 20m+
I'd love it if he played in the PL... but if there is a god, it's not for United.