Does it eventually reconnect to your network? If not, does power cycling get it to reconnect or do you have to re-enter your network info?
Unfortunately our initial download process does not handle disconnects gracefully. The latest update will be much better in this regard, but that only helps you if you can download it of course. A couple people have had intermittent connections and were eventually able to download the update by using a different access point (friend's house, work, phone hotspot, different router, etc). If you are able to get it to download using one of these means, it will hopefully be smoother in the future.