Well, sort of.
Alongside the second round of the Candidates matches, Deep Fritz and Deep Junior are playing a
six-game match (or so we all pretend, but we'll revisit that topic some other time), with $60k to the winning side and $40k to the "second-place" finisher. The reason for the "sort of" comment above is that Rybka, which has been the top-rated program for over a year, wasn't invited, and its programmer, IM Vas Rajlich, isn't happy. He offered a
counter-challenge, but it's unlikely to go anywhere, even if the Deep Fritz-Deep Junior winner is on a par with Rybka. ChessBase programs already have the lion's share of the market, so they have little to gain and tons to lose by accepting Rajlich's challenge.