I enjoy reading this guy:http://www.tradersparadise.blogspot.com/ If youre interested in what goes on behind the scenes at woodies club check the archives. Some interesting stuff.
I doubt top traders would have the time to write a blog. There are some good blogs though, check out this thread http://www.elitetrader.com/vb/showthread.php?s=&threadid=71703
I think they are all covered in the thread from the above post. My two favorites: http://traderx.blogspot.com/ http://www.tradermike.net/
FYI - there is a blog called StockTickr that does interviews with top traders, and they had an interview with Trader-X last week. Really good, as are some of those in the archives. http://blog.stocktickr.com/2006/07/26/interview-with-trader-x/