David Pogue, the tech columnist for the New York Times, recent tweeted that you can install more than 180 apps on your iPhone and then access them via Spotlight search:
You can install UNLIMITED APPS! Only 180 show up as icons—but Spotlight can find and open all of them! (And yes, we tried. Stopped at 250!)
The only problem I see to this is that if you install your 181th app, you won’t be able to move it to a page to organize your apps since you can’t see it on any of your home screens. You’d also have to uninstall the app via iTunes on your computer because you can’t see it to tap and hold on it if you wanted to uninstall.
Since my iPhone is jailbroken, I am using categories to organize my apps that aren’t on my first couple of pages. Unfortunately none of this works on Web Apps. You can’t Spotlight search for them, you can’t put them in categories, and you can’t even put then in a Stack.