hey, there's been a lot going on around here as far as figuring out a solution to the *very* limited space for application icons on the homescreen.
my personal favorite solution is iSwap, found here:
http://www.modmyi.com/forums/downloa...do=file&id=376
not exactly what your asking for, but might be a good solution for you anyway.
there is also another installer application that can be used to launch any program it has installed on your iPhone (regardless of whether or not it has an icon on your homescreen). I wouldn't suggest this program however as I've heard it has the ability to brick phones. might just be a rumor tho... I believe that download can be found on this site as well (in the downloads section) but im too lazy to link it for ya.. (one link is my limit!)
went and got you some more links anyway...
iSwap in action:
http://www.youtube.com/watch?v=TLqG1-XR1ug&v3
iLauncher/Installer (MAY BE UNSTABLE!):
http://www.modmyi.com/forums/downloa...do=file&id=382