Now that Rogers and Fido are set to rollout Apple’s iPhone 3G, a developer has announced three applications for the smart phone.

Steven Creek Software LLC of Cuptertino, Calif. a has announced TripLog/1040, which helps you use your iPhone to track tax-deductible mileage. TripLog/1040 keeps track of mileage, destination, purpose and costs. It can also “memorize” frequently-taken trips, provides total mileage driven for selected time periods and can e-mail the log.

Along with Athlete’s Calculator and Handy Randy, TripLog/1040 is scheduled for release the day that Apple’s App Store goes online, on July 11th. Pricing was not announced.

The Athlete’s Calculator is the iPhone implementation of a software app that Stevens Creek Software previously created for Palm OS. It can perform calculations of time, distance and pace or speed, performs arithmetic calculations, such as adding up “splits” to produce a total time, and handles both English and metric units and distance conversions.

Handy Randy is a random number generator that can select random numbers from up to three unconnected ranges. It can select numbers in pairs, choosing a random number first from one range and then another. Practical applications for Handy Randy run the gamut from games to picking lottery numbers, performing business audits or handing out prizes at events.