SORRY - channel PEAR is no longer available on Roku.
To get started, install the channel on your Roku, then sign up for a free account at channelpear.com. Pair your Roku to your PEAR account, and you can start adding material to your media library.
If you know the URL of a feed, you can add it yourself. The following file types are supported: MKV (H.264), MP4 (H.264), MOV (H.264), M4V (H.264), M4A (H.264), M3U8, M3U.
The channel PEAR website offers a number of pre-installed sources, including TLC, Discovery, NAT GEO WILD, CNN, MTV, Food Network, Animal Planet, Travel Channel, and ABC News. Once you've added a custom or pre-installed source through the website, exit and reload the Roku channel and you'll find the feed on the main menu. The pre-installed sources listed above will provide you with a live video stream from the selected network.
The pre-installed sources offer some interesting content, but don't expect these feeds to be a replacement for what you're accustomed to viewing through cable. For example, TLC it appeared to be a feed from TLC Asia when I viewed it, the video was not full-screen, and it reloaded often. Likewise, Food Network videos had foreign subtitles and video quality that was a bit lower than standard definition. Regardless of those limitations, both feeds were of American English-language shows and definitely watchable.
Channel Pear Website