So the rumors are true: there is an Android OS 2.2 dual SIM phone out there. And here it is: the ViewSonic V350. This phone sports Android 2.2 (Froyo) as previously stated, and may be upgraded to OS 2.3 (Gingerbread_ before release.
It has a 3.5 inch display with 480 x 320 resolution, a 5 megapixel camera and as stated it does support dual SIM cards. The first SIM is quadband GSM plus dualband UMTS (900 / 2100MHz HSPA), and the second one is quadband. Viewsonic continually says that this phone is Google-certified, so I'm assuming that means its not second class.
But I digress. This phone should be a viable contender. Let's wait and find out, shall we?