the most recently entered channel/s or important news and updates will appear on the main page in the center column. i try to keep special deals at the top while they are relevant so read a post or two back for the latest channels.
on the right side of the page is a list of filterable tags. like "paid" "free" "cheap" or by "movies" "tv" "classics" "education" "comedy" etc.
when you want to go back a page, click "Older Posts" where it appears just under the last post of the page, on the right
the channel entry will include any known codes, links to add it and/or tell you whether it's in the channel store (public channels)
*9/10/2012 some users report CNN isn't working on older rokus, even when you update the firmware. if this affects you, some of the same content may be available on nowhere TV