I was sure I posted this before, but here goes:
1) Monsternomicon
2) Chaositech
3) Slarecian Legacy
4) Iron Kingdoms World Guide
5) Iron Kingdoms Campaign Guide
Not my top 5 all time favorites, but great tools for one campaign. No adventures listed here, as I'm assuming I'd have plenty of time to create these...
And if I ever found myself stranded a second time

:
1) Midnight MK2
2) Crown of Shadow
3) Fury of Shadow
4) Minions of Shadow
5) City of Shadow
Or a third

:
1) Freeport City book
2) Freeport Trilogy
3) Black Sails over Freeport
4) Creatures of Freeport
5) Seafarers Handbook
And goodness forbid, a fourth
1) Arcana Evolved
2) Legacy of the Dragons
3) Draconomicon
4) Ptolus ( it should be out by then eh? )
5) Expanded Psionic Handbook
Needing a new mode of transportation by now:
1) Shackled City Adventure Path
2) Book of the Righteous
3) Dynasties and Demagogues
4) Grimsooths Traps
5) Book of Fiends
I guess Eberron might be fun too:
1) Eberron Campaign Setting
2) Races of Eberron
3) Five Nations
4) Explorers Handbook
5) Bastions Airships