Wawrinka was an up-and-coming player for a few years, completely living under Federer's shadow as the other legit Swiss player on tour. I believe he broke into the top 10 last year and is now firmly established there. But, the top 4 being pretty much impregnable, it's nearly impossible for any of the second tier players such as Ferrer, Berdych, Del Potro, and now Wawrinka to break thru. He's done it and has a great opportunity to win his first major.
As for Djokovic, I thought his decision to bring in Becker as a coach was a curious move. I've never really been a Becker fan, especially once I found out about his preference for dark meat.
On the women's side, I hope Radwanska can finish the job and win her first major. But if Li Na makes it to the final, the DWFs will undoubtedly be her side.