Apparently Perez hasn't had any talks with Ferrari - http://www.autosport.com/news/report.php/id/101495.
I'm fairly sure that both HRT and both Marussia drivers are paying for their seat
With the Williams suddenly back up the sharp(er) end, Maldonado is suddenly buying his way into a decent seat.
Senna brings significantly less money to Williams than Pastor. He also isn't buying his way out of loosing his super license either, whereas Pastor is well on his way to that.
Its not about having 1 sponsor that pays your way either, its about having a portfolio of sponsors that you bring to a team as part of a package. It spreads a lot further up the grid than you might think.
I think the only driver in the 'new' teams that is paid is Heikki.
Santander back Alonso, but he also takes a wage from Ferrari.
Its this 'getting paid by the team' rather than being paid out of the sponsor money you bring to the team that differentiates them.
I'm fairly certain Kobayashi's seat is backed by Japanese investment (it definitely got him into F1 to start with). Both Senna and Pastor pay for their seats. Don't know if Perez is propped up with Ferrari money. Di Resta's seat is 'paid for' by Merc and their engine deal. It really is only the top few teams where the drivers are paid for their skills alone and their sponsorship is earnings on top.
Silly season seems too soft for this rumour - http://www.grandprix.com/ns/ns24365.html
Kimi back to Ferrari
Fast Heikki?