How long does it take for your iphone to reboot after being jailbroken?

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I've had the old school 1st gen iPhone (EDGE, no GPS, etc.) for a couple of years now and just finally switched to the new iPhone 3G. Having never been able to use any of the GPS features I was wondering if anyone out there could suggest some cool apps in the Apple App Store that take advantage of the 3G's GPS and other features. Thanks in advance!
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