iStumbler is an easy way to scan for information about the Wi-Fi environment around you, as well as see available Bluetooth devices, and what Bonjour services are available on the local network. The latest version, release 99, works only with Mac OS X 10.6.2 or later, adds support for the 5 GHz band used by 802.11a and 802.11n, and takes advantage of the coordinate-based location feature in Snow Leopard to allow GPS-like tracking as the application scans. (Free, donation requested, 1.1 MB)
iPhone Calendar Starting on Sunday
Annoyed that the iPhone's Calendar app shows the weeks starting with Monday, although iCal (and most paper calendars) start on Sunday? Here's the answer: go to Settings > General > International and change the Region Format from English to United States.
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