ALONs are six night award stays usable at either of the two Hilton Hawaiin resorts (HHV and HWV -- can't split the reward and use both hotels during one 6 night stay).

GLONs are six night reward stays available at various Hilton properties around the world.

Prior to 2003, the ALONs were available for 100,000 HH points, and by most were considered to be a very good value. Now the rewards are available for 175,000 points, which many find a bit expensive.

GLON points requirements also went up, but not sure how high.

ALON and GLON VIP rewards are for Silver, Gold, and Diamond HH members.