I don't know, so I'll split them by how much they deserve to be in a seat:
Barrichello if someone needs a tester - Lotus might be good Maldonado - no Buemi - yes, unlucky this season Alguersuari - yes, but lucky this season Karthikeyan - no Liuzzi - maybe. Decent midfielder, I think, but nothing more. Ricciardo - send him to GP2! d'Ambrosio - he won't be, which is sad Senna - doesn't always back up his qualifying performances - I'd rather see Sutil or Grosjean Petrov - sadly not good enough. Get the 2011 Australian GP on DVD though! Chandhok - get him in a Commentary Box!
in that case Maldonado, Buemi, Alguersauri and Mr Petrov
Don't think they'll put Ricciardo in the Toro Rosso anymore and the Caternham deal will fall through but we'll def see him in 2013. Our friend Jerome Pudding is gone for this year but I think he'll land a test role somewhere and may get a drive or too in the future.
I was a bit here and there on Liuzzi because he may be in line for another year in HRT but otherwise I think his F1 days are gone. Rubens I'd love to see get a drive but I get a feeling he won't.
The others I'm afraid have tried and failed for me