As far as I know, you can connect Wiimote to a device other than Wii if you use the bluetooth stack / program that allows you to skip the PIN code. This is possible on different laptop computers, but Android 2.2 requires a PIN for the first pairing.
However, depending on which phone you have, you can try the WiimoteController app. It does not connect to HTC devices running the Sense user interface, but if you have a Nexus One or you have some kind of custom Android player on your phone with an Android phone, it should work.
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