I see questions about whether Office Accounting 2007 will be released outside the US on a daily basis (especially from my fellow countrymen in Australia, and from folks in Canada and the UK) so hopefully this will help set things straight.
Microsoft Office Accounting 2007 is currently available within the USA only. At this stage, no plans exist for international availability of the product, with the exception of the UK. In May 2006, Microsoft Office Accounting 2007 (UK version) entered Beta testing in the UK with a targeted set of customers and partners. Once Beta testing is completed and the results have been fully reviewed, further updates will become available on the UK product launch. We anticipate having these updates in the first half of calendar year 2007.
Unlike most other products it isn't a matter of just localizing the text and releasing it in another country, the product has to be customized to a particular country's tax laws and accounting practices or we could find ourselves in some legal hot water in that country. Having said that, you are of course free to download the US English version and try it out.