BusyMac has released BusyCal 2.0.2, a minor update that puts paid to several bugs. The update fixes some unspecified Google Calendar syncing bugs, a bug that prevented past due to-do items from showing in the To Do List, bootstrapping bugs with Daylite and Zimbra CalDAV Servers, and a bug that occurred when entering start times between 0001-0059 in 24-hour time. It also adds an option to print multiple months/weeks when viewing a custom number of weeks/days. ($49.99 new, but currently selling for $29.99 solely via the Mac App Store, free update, 8.3 MB, release notes)
Option-Click AirPort Menu for Network Details
If you hold down the Option key while clicking the AirPort menu in Mac OS X 10.5 Leopard, you'll see not just the names of nearby Wi-Fi networks, but additional details about the selected network. Details include the MAC address of the network, the channel used by the base station, the signal strength (a negative number; the closer to zero it is, the stronger the signal), and the transmit rate in megabits per second showing actual network throughput. If you hover the cursor over the name of a network to which you're not connected, a little yellow pop-up shows the signal strength and type of encryption.