Our recently approved (today) TA at Express Jet allows for 10% of the reserve lines to go long call. (12 hours) I've heard some folks express an an opinion that once crew scheduling begins using this there's a chance that they'll actually want to have more long-call reserve as it somehow allows them to better plan availability. (Forgive my ignorance, I'm new to this 121 stuff, so I'm still learning the logistics and terminology involved.)
I know some airlines take the pressure off commuters with a commuting policy. At Southwest for instance, a pilot has only to provide himself with two on-line flights to get to work. If he or she gets bumped, WX's or MX'd, they're off the hook. Neat policy as it encourages honesty and prevents widespread abuse of sick days.
Drop me a line in a few months and I'll let you know how it's going once we implement long call.