User blog comment:Gracey91/1.1 Update/@comment-67.142.178.27-20111201150540/@comment-4085927-20111201151106

If you on you computer at the time you will see a little pop-up from steam saying it has finished downloading. If your away form your computer but checking in, look at the bottom of steam right in the center, if it has downloaded something it will say "1 completed download" or it will say its still downloading. Then you can check the downloads page to see if its Terraria. The other option is to go to the steam news page and just refresh it every now and then, as soon as the update is live the news of all the new items will be there.