I recently reuploaded Strike Fighters2, Wings over Vietnam 2, Wings over Europe 2, and Wings over Isreal 2, but I can only find the Nov 2011 update on the Thirdwire site; can someone tell me what other updates there are and where to find them?

Well reupload?

When you have just downloadet the sims again from thirdwire´s hompage,
then you haven´t got to install any patches. The install files are all at the latest level.
Nov11 is the latest level.

When you start the sim it tells you about new updates.
And you can see it in the mainscreen.
If the version iswritten there in green, you are on the latest patch level.
If it is thwritten in red, then there are newer updates available.

also there's older patches section in Thirdwire's downloads

Well they only work with older install files then.
If i have understand it correct, the newinstalled those titles.

1st: installing the latest patch is enough. No more need to install thousands of patches in order.
2nd: if he redownloadet the games, no patching needet.

Didn't redownload, I had them on a disk. When I tried to use the NOV 11 update, it told me I needed an earlier update first. I'll doublecheck the thirdwire site for the old patches, I must have missed that section.

Edit: found the previous updates with no problems when I double checked.

Is there a weapons pack out for Strike Fighters 2, like there was for the originals?

SF2 is an original too. :-p
Yes, there are weaponpacks out for SF2.
Check out this:
http://combatace.com/files/category/403-sf2-series-add-on-weapons/