I'm in the UK and currently posting my paid-processing-included films to Kodak, Switzerland, as per Kodak instructions. Kodak send them to and from Dwaynes and post them back from Lausanne...two to three weeks. No change in the system or service since 1st January.
I'm using in-date K64 and the last of my expired K25 and K200 from my freezer, no problems or extra charges with either.
The only change in the mailers is that the ones from the last batches of K64 are overprinted with a warning that Kodachrome processing finishes at November 2010 (presumably giving Kodak a month's leeway as Dwaynes are finishing direct processing at 31st Dec.)