Thomas Cook had 6 cadets from OAA and about 20 Pay-To-Fly-150-hours FOs from an Alteon scheme that they made redundant around 1st October 2009. They allegedly will take the OAA Cadets back if/when flying picks up again in the Spring.
BMI is also sourcing pilots on Pay-To-Fly schemes and these have jumped to the head of the flight deck queue while fATPL holders from BMI's pre-recession pilot hold pool are still pushing trolleys in the back.
I think Astreus has been doing PTF for a few years with Stapleford, Air Asia does it and now EasyJet. There will be more I haven't heard about and I think it will just keep spreading as long as people will sign up to it and there's not a smoking hole forcing the regulators to step in and stop it.