Don't give gamers IOUs. Just surprise us.... and email me when the surprise is ready, so I don't have to keep checking your stupid site. =/
Delays lead to apathy. I would have bought S.T.A.L.K.E.R. if they hadn't dragged it out so damn long. Darkfall has lost me the same way. Don't advertise uncertain dates. Keep your internal milestones to yourselves, for pity's sake!
That site for the Civ: Revolution bonus content originally said something like "end of this month", which has now been changed to "shortly".