All five of the most recent / current sets are still available at the local TRU here (albeit most of them with the exorbitant TRU markup; as it happens, Fighter Plane Attack is MSRP, but that's the one I've already got), and Target here has all of them except Chauchilla Cemetery Battle.
Wal-Mart here clearanced away its Indy sets. As it happens, my terrible finances forced me to return one of my Fighter Plane Attacks a few days ago; I got paid again yesterday and went back to WM for other things, and what should I find but the last Fighter Plane Attack - the one I returned - back out on the clearance shelf, now marked down to $10! Sweet! Needless to say, I picked it up (again). It's now the second-best deal I've gotten on an Indy set (after getting my second copy of River Chase for just $2).
I can't come anywhere close to getting five of everything, but I would like to get at least two of everything, and more of certain things. I do actually have seven copies of Race for the Stolen Treasure; I feel pretty lucky that worked out! Right now the ones I most wish I could get more of are a second Temple Escape (it's the only regular retail set from any of the first three waves I haven't gotten more than one of), a third and fourth Temple of the Crystal Skull, and a third, fourth and fifth (and heck, more if I could find them) Jungle Duel. I may try for a third Shanghai Chase and / or Jungle Cutter soon. I do also still need my first copies of all the sets from the latest wave, except of course Fighter Plane Attack (of which I now have two copies, and don't feel I need more unless I find more great deals). Of the remaining four, I plan to get as many copies of The Temple of Doom (hard) and Ambush in Cairo (easy) as I can, and probably just two or three of each of the others.
I'm also hoping to finally get the magnets and DS cases and finish getting the keychains, "just because."
My own set list so far:
Winter 2008
7620 Indiana Jones Motorcycle Chase x3
7621 Indiana Jones and the Lost Tomb x3
7622 Race for the Stolen Treasure x7
7623 Temple Escape x1
Spring 2008
7624 Jungle Duel x2
7625 River Chase x2
7626 Jungle Cutter x2
7627 Temple of the Crystal Skull x2
Summer 2008
7628 Peril in Peru x2
20004 Jungle Cruiser [BrickMaster Exclusive] x1
Winter 2009
7682 Shanghai Chase x2
7683 Fight on the Flying Wing x2
Summer 2009
7195 Ambush in Cairo x0
7196 Chauchilla Cemetery Battle x0
7197 Venice Canal Chase x0
7198 Fighter Plane Attack x2
7199 The Temple of Doom x0
Accessory items (only listing those I do have - one of each)
Indiana Jones minifig keychain
Henry Jones, Sr. minifig keychain
German biker / pilot minifig keychain