There's an update to the controversy at teleread but it does appear that the UK resellers have been slamming the Paris based sister company Hachette Livre about price imbalances between the UK and US and naturally plenty of UK people have been buying from US reseller.
Don't expect to buy any Hachette titles in the US in mobi, lit or ereader for awhile, at least until the resellers cowtow to Hachette's blackmail anyway