Good news, earthlings! Apparently Google's taken all the complaints about Nexus One upgrade pricing to heart, because it's giving $100 rebates to people who paid $379 for the HTC-built handset -- and it's going to be offering that lower $279 price to even more current T-Mobile subscribers, although we still don't know how that's determined. That means the new Nexus One pricing tiers break down like this: $579 unlocked, $279 upgrade for current T-Mo subs, and $179 on a new 2-year contract. Handshakes all around. Now, let's fix up family plan activations and that