Movie review - "Bubba Ho-Tep"

Is it a metaphor for how we treat the elderly in this country? Is it a redemptive tale about rediscovering your true self? Is it really just about Elvis and JFK taking on a mummy? I don't think I've ever come across such an oddly compelling combination of "bittersweet" and "completely absurd". Not for everyone, but I found it very enjoyable. Bruce Campbell and Ossie Davis are just about perfect in the lead roles.