Countdown timer

[P Gales]

Hi,

Not sure if this is the best place for this but here goes.  I'm interested in adapting jreviews to use as a deals site (like a groupon.com).  I'm still working through what jReviews could not do (for a deals listing), but the one big missing is a countdown timer to show how many days/hours are left in a deal.  

Does anyone have any idea of how difficult/easy this would be to integrate a countdown timer into a jReviews listing?

Thanks for your attention.