I don't think Wilshere is going anywhere now. I don't think AW fancies facing Ramsay in the prem, so he's out on loan to Norwich I believe.
Vela....now he could be available for a loan deal. He needs toughening up. Not sure Villa are the right club for him. You're more a footballing side than a physical team like Bolton and I think Coyle may have put in his request already. You have decent fast wingers. Not sure if he would fit the bill as a striker, or if you need one.
How about Diaby or Denilson? lol. I would suggest also Bendtner, but I think he may be off to pastures new. That and he had his chances to improve at Birmingham a few years ago.