The last days I created a minimal Debian Wheezy amd64 OpenVZ template for myself. It's inspired by the minimal Squeeze template listed in the contributed repository of OpenVZ templates, e.g. the packages are more or less equal.
It's based on debootstraps min_base of Wheezy and has a total size of 86MB (Squeeze minimal has 75MB).
Since there are no other Wheezy templates around yet, I'm happy to share the result with you. Personally I'm going to setup new containers with it, since it won't take ages upon Wheezy getting stable and upgrading from Squeeze is easy, but not as easy as starting directly with Wheezy.
Note: /etc/apt/sources.list contains mirrors - you might want to change those.
Please not that 7.0 is not stable yet by nature - keep that in mind.
I'd also appreciate feedbacks, since this is the 1st template I've created - it looks and feels of high quality, but many eyes see more than two.