This is excellent news for Andy that his Non-Hodgkins Lymphoma is in remission. John Hannah was interviewed on the BBC show "The One Show" and revealed that Andy is in remission. UK residents can watch/listen to these on the BBC iPlayer. John mentions that Andy is 'in remission'. Unfortunately for the rest of us not in the UK you can't view the interview.

Andy's remission was also mentioned in The Guardian UK interview with John on 16 May 2010

I ask what's next, and he says he's preparing for the second series of Spartacus in New Zealand. This had to be put on hold when the lead actor, Andy Whitfield, was diagnosed with non-Hodgkin's lymphoma. Hannah says he is now in remission.

MERCK lists the following about remission for those with Non-Hodgkins Lymphoma

It is somewhat of a paradox that indolent lymphomas usually respond readily to treatment by going into remission (in which the disease is under control), often followed by long-term survival, but the disease usually is not cured. In contrast, aggressive non-Hodgkin lymphomas, which usually require very intensive treatment to achieve remission, have a good chance of being cured.

There hasn't been any official word from Starz updating on their press release about Andy's illness. Hopefully that will come soon.