iPhone Application Waiting

Have you downloaded the app with iTunes on your computer?
If so, have you tried to install or re-install the app from iTunes on your computer via the iTunes sync process?
I prefer downloading apps with iTunes on my computer and installing the app from iTunes via the iTunes sync process.
 PowerBook G4 17-inch/1.67GHz/2GB RAM Mac OS X (10.5.5) 7200rpm-100GB HD,  iPod w/Video 30GB,  iPhone 3G 16GB

I did download to my computer. When I tried to sync, nothing happened. I tried deleting the app on the computer and iPhone and reinstall, but nothing happened.
All Ive had on my phone for the last three days is a Google icon with an empty progress window in the icon.
I cant get rid of it.
Macbook Pro, iPhone 2.2 Mac OS X (10.3.x)

I suggest doing a restore with iTunes.
This will erase your iPhone first followed by re-installing the current firmware version. This must be followed by a sync.
 PowerBook G4 17-inch/1.67GHz/2GB RAM Mac OS X (10.5.5) 7200rpm-100GB HD,  iPod w/Video 30GB,  iPhone 3G 16GB

Eeek! Will I lose my contacts and photos?
iMac Mac OS X (10.3.x)

The iPhone is designed to be synced with a supported application on your computer for contact info and calendar events.
With a Mac, this can be with the Address Book for contact info, and with iCal for calendar events. This is selected under the Info tab for your iPhone sync preferences. If you havent been syncing contact info with the Address Book on your Mac, now is a good time to start. If you dont currently use the Address Book on your Mac for storing contact info, before syncing enter one contact in the Address Book - make one up if needed, which can be deleted later.
This will provide a merge prompt when syncing contact info, which you want to select. This will place your iPhone contact info in the Address Book on your Mac. After doing a restore with iTunes and restoring your iPhone from your iPhones backup, your contact info will be replaced with the required sync that follows.
Photos captured by your iPhone should be imported by your computer - as with any other digital camera. You can use iPhoto or the Image Capture application on your Mac for this.
 PowerBook G4 17-inch/1.67GHz/2GB RAM Mac OS X (10.5.5) 7200rpm-100GB HD,  iPod w/Video 30GB,  iPhone 3G 16GB