That and other questions surrounding the freezing of meat are addressed in this archived post over on the excellent Cooking for Engineers blog, a site I've been meaning to give a proper mention of here in addition to the sidebar link on the blog here.

Michael discusses the following aspects of freezing meat in this post:

Freezing Duration

Freezer Burn

Packaging Meat For Freezing

Thawing

There are some good tips and ideas in the comments section as well.

Overall, this is a thinking man's food blog. Great analysis of techniques and recipes, as well as outstanding photography of the process.