Same problem for me. I used to just record as many shows as I wanted, but with my habits shifting to more HD fare, I have to be careful not to max out the 250GB drive (???!!!???). Gotta cut back on the HDNet travelogue programs I guess.........
Programming note...... Don't miss two good shows on HD. CES 2004 Roundtable is on HDNEt (See Charlie, Mark Cuban, Eddy, and a bunch of Cable guys debate future HD content.) Charlie actually mentioned E* and D* possibly sharing spectrum to help provide more channels than is currently possible.
Also, DiscoveryHD has a show called ThrillMakers which focuses on Walt Disney World. They show a LOT of the Tower of Terror, Test Track, Aerosmith Coaster, Splash Mountain, and most importantly, the new Space ride at Epcot. Wow.