They have also added a new Zone for Australia, New Zealand and a few others in that area - we don't have a full list yet as the link on the Royal Mail website to the list does not work.
The minimum S+P rate will go up as follows for any Non-UK order placed after 6pm on Wednesday 25th April 2012.
Europe - £3.90 (previously £2.69)
Rest of the World - £4.50 (previously £3.27)
Any S+P quote sent out before that time will have a deadline for when the quote is no longer valid. When that deadline has passed we will send a new email with the new S+P costs.
We will actively look for other operators between now and then - please check back here for any updates.

