So they did overpay a bit. But there is a genuine synergy - a phone company being bought by a company that makes a phone OS.

This might hurt Android adoption a little, but I doubt Google really cares. All they really want are more browser phones, which will funnel more money into google (via adsense). Or maybe it will make Google more sensitive to what direction Android has to go.

I don't see how the "Googlerola" hardware can hurt Android adoption. If you are a smartphone maker with at least some ambition for market share you either use Android or get ready to fall short on sales.

Aside from Apple and MS-Nokia, until something disruptive happens in the phone OS scene Android is the way to go for phone makers.