135kms speed should be the cut of for a fast bowler, in case if some one continuously fails to deliver at that pace. He should be rested to gain back his Fire again. In India we start with 140 and end up bowling slower than Anil Kumble who himself use to bowl some time at 120kms speed.
after 2004 success in Pakistan, his record against quality sides like SA, AUS, ENG and SL is very poor. He fared good against Pak, Zim and BGD. Selectors should consider him in ODIs first and based on the performance draft him into test cricket.
Remember the infamous replacement of Srinath with Noel David in West indies? Not that I recommend but with the kind of team selections off late, wouldn't be surprised if Bhaji gets another chance ;)
Even praveen is not a great bowler but has taken wickets at times. It is matter of time for him to get punished and leave the team not becos of injury that time.
If he got his magical swing back, and he grabbed 21 wickets in 4 matches den He is the only person who can replace PK. If he got his place in team than it will be very interesting to watch How Dhoni will pick his team in Australia. I really hope that Irfan will definitely get his place in team for Aus tour