I have created a Rainmeter Skin for viewing channels that you follow that are currently live which also includes online notifications and other features. If you’re interested, you can check out the thread on /r/Twitch here: http://www.reddit.com/r/Twitch/comments/2r2026/live_following_for_twitch_a_rainmeter_skin_091/
Or you can check it out at my webpage about the skin here: http://www.wallboy.ca/rainmeter/
It uses a Lua JSON script to parse the JSON feeds returned from Twitch API.