yea, you can actually put it back by replacing the phone_app.prc or something similarly named. check shadowmite.com for a prc file that supports call logs with time etc...
Treo 800w 8/08 Nokia N800 previously: Treo 700wx 12/06, Sprint 6700 3/06; Treo 650 11/04; Treo 600 1/04 (gone); Samsung i500 (gone); Hitachi G1000 11/03 (gone); Nokia 7110 5/00(best phone ever)