Ok, also don't forget he will count Djourou as a new signing as well.

Personally I think we need to buy a new keeper. I'd like to keep Almunia as number 2. I don't believe we can have a successful Carling or FA Cup run with Fabianski in goal. I don't see what everyone raves about in him to be honest.
I'd like to see us address our centreback position again. Silvestre needs to be let go, and I think we can let Gallas leave to. Resign Campbell if he wants and then bring in one (or two new ones). One of Subotic or Hangeland would do for me. Match some size with Vermaelen's speed and intelligence. Senderos will be released or sold this summer I guess (has he even played for Everton?). I don't know what future Nordhveit has with us, but Kyle Bartley may step up into the team at some point. He seems to have promise.
I also would like to see a reliable partner or deputy for Song. It's true that we are devoid of impetus without Cesc but we are fragile without Song. I think we can scrape wins with strong defense if Cesc is out, but when Song is not covering our line we are so exposed. I'm surprised Rosicky wasn't given a chance to fill in for Cesc instead of Nasri this season. It's a natural position for him, better than out wide.
For forwards, it seems like a done deal that Chamakh is coming and that will suffice.
So I make it 4 signings, but would settle for 3.