This one was set to expire yesterday, but Dell has extended this deal. Dell has the Hauppauge HD-PVR component tuners (read more about it here) for your HTPC setup now for $164.99 with free shipping:
Dell has the Hauppauge HD PVR Component Video Recorder for $164.99 (219.99 less $25% coupon code 7WD7KLJJNSZX44 - and free shipping!
If you're planning to get one don't wait - the offer expires May 20th 2009.