The president's "State of the Union" address before the full congress and others will be televised and livestreamed this evening.
Local programming seems to start generally at 7:00 p.m. MT and end at 8:30 p.m. MT. The cable networks (i.e., CNN, FOX, etc.) may have other start times and certainly vary for the scheduled end.
C-span.org (C-span1) has their programming scheduled for 3 hours which will include comments from callers. This is available on-line besides on TV.
Tea Party Express (.org) will be carrying Senator Rand Paul's speech immediately after the president's address. They will also be helped by RedState.com for livestream.
The Blaze available on-line (or on DirectTV?) will be carrying all of the addresses. Their preliminary commentary has started. There is a way to sign up for two-week trial for free.
The program starts at 7:00 p.m. MT (9:00 p.m. ET). The C-span and cable news programs will be repeated during the night.