I've been using the refreshed 2013 Nexus 7 for a little over a week now and it is amazing - if you've been looking for a new 7-inch (or so) tablet, then this is the one for you. But now the 4G LTE model is available from the Google Play Store for $349.
Before now, you could only get the Wi-Fi-only model, which is a bit of a mood killer if you wanted to use this on the road without a Wi-Fi connection or having to bother with tethering your smartphone to it for Internet. You can buy the 32GB unlocked LTE-capable Nexus 7 from Google Play right now, with free shipping. You'll also get a free T-Mobile SIM and 2GB of free LTE data to use in the first month.