Here's a quick summary of the differences between the iPhone 3G and Samsung OMNIA SGH-i900 : (more desirable featured phone is in bold)
In the camera department, the Omnia has 5 megapixels to the iPhone 3G's meager 2 megabytes.
In regards to screens, the Omina is 3.2 inches, smaller than the iPhones 3G's 3.5 inches.
Omnia supports 3.5 G super fast HSDPA (7.2 Mbps) while iPhone 3G is US 3G ---OMNIA is not USA 3G ready yet.
Omnia has video capture and editing.. The iPhone can't capture video, although playing video is fine.
An unlocked Samsung Omnia is selling in mid August for around $700. The iPhone is much cheaper.
Omnia has GPS, iPhone 3G hast it too. The winner will be decided by GPS app availability.
The Omnia is made for world access. Omnia is a Windows app, it may be the Windows users choice outside the United States. For full specs of the OMNIA please read OMG the Samsung OMNIA Is iPhonelisciou with 5 Mpx Camera and GPS.
A new Samsung Omnia Review of Reviews was posted on August 19.