1: Twilight Princess (Wii)
2: The Legend of Zelda (NES)
3: Lelda II; The Adventure of Link (NES)
4: Wind Waker limited edition (GC)
5: Ocarina of time (GC, included with above title)
6: Ocarina of time master quest (GC, included with both titles above)
So SwS will be the seventh (fifth if not counting bundles) Zelda game I will own.
Well, I already have LoZ, AoL, OoT, MM (all on CE), OoT (N64) WW, TP and OoT3D. So if I count CE as four seperate games, and all three versions of OoT as seperate entities, than SS would be my 9th game... unless I got another one somewhere in between. I've been thinking of getting either LA, OoA/OoS, so who knows...
Hmmm, let's see...*counts on fingers*
If my math is correct, Skyward Sword will be the 12th Zelda game I've bought. Assuming that I preorder and picking up on the first day, it will be the second one I buy on launch.