View Extra Bluetooth Details in Snow Leopard
In Snow Leopard, Option-click the Bluetooth icon in the menu bar to view a few additional items in the Bluetooth menu. Specifically, it enables you to open three utility applications: Bluetooth Explorer, Bluetooth Diagnostic Utility, and PacketLogger. These are likely of interest primarily to experts, but if you're having troubles with Bluetooth, the Bluetooth Diagnostic Utility in particular may be useful. (These tools are available only if you've installed Apple's Developer Tools.)
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Just depends on what sort of data you're storing, and your comfort level with storing that data with a third-party.
And on that topic, my bet is that we'll see an iPad app at some point, but not an iPhone app. But who knows!