The launch of the OneGuide to preview program members appears to be more of a beta thing that one might think as Microsoft has admitted that they will be taking the feedback that the get from these users and incorporating this feedback into the UK full release of OneGuide.
Users in Canada, France, Italy, Spain and Germany who have also registered with the preview program will also apparently be able to start using and testing their localized version of OneGuide in the weeks ahead. The plan is to roll OneGuide in these countries as well at some point in the near future after getting feedback from those in the Preview Program.
Also, updates to SmartGlass will allow for both TV and DVR control if you have everything configured correctly.