But suppose you can’t see it tonight. Or maybe you want to watch it over again tomorrow. Well, good news for Comcast cable subscribers. The three presidential debates, and the vice presidential debate, will be available On Demand, the day after their original broadcast. C-SPAN, Comcast Media Center and TVN Entertainment are teaming up to make the debates available to viewers. [I stand corrected. Other cable operators are also carrying the debates on Video on Demand as well. Check your local system.]

Comcast has already made On Demand programming available from the Democratic and Republican conventions, major speeches from the candidates and Spanish language content.

You may recall an earlier post on C-SPAN’s Convention Hub, which provided online coverage of the two conventions. Now they’ve launched Debate Hub, a one-stop shop for embeddable video of the debates, coverage from the blogosphere and a variety of other tools for broadband subscribers.

Features include:

• Embeddable video of all debates in their entirety from the C-SPAN Video Library. Users can edit, share and post this video on their own websites.
• Interactive timelines that allow users to watch the debate or read the transcript question-by-question and candidate-by-candidate.
• Word trees that give visual representations of the language used by each candidate throughout the debates.
• Aggregated blog and Twitter coverage of the debates, enabling users to follow the latest online debate news and analysis.
• Debate Cam, providing live streaming video from multiple locations including the debate hall, media filing center, protest area and on-campus debate watch parties.

And while it has nothing to do with cable, I have to give a shout-out to Twitter’s new Election 2008 portal, which allows you see tweets flowing by in real time.