Hi Tamas,
We discussed this in the EF design meeting (Notes: http://entityframework.codeplex.com/wikipage?title=Design%20Meeting%20Notes) and decided that we would be happy to accept a contribution for this.
Please remember to follow the instructions for making a contribution (http://entityframework.codeplex.com/wikipage?title=Contributing). In particular, we will need a signed CLA before we can accept any code, and please don't forget to write tests.
Thanks,
Arthur