[cryptonector]

Sun selling Amgias would have been quite interesting.

As for AD, Sun had an opportunity to buy u/lukeh's XAD, which was compatible, and it could have done the whole embrace-and-extend thing to MSFT. Instead Sun passed on the deal, Novell bought it instead, and then MSFT acquired Novell. At the time the Sun DS folks were not particularly interested in taking on AD -- they had a cash cow and they were milking it, so no need for innovation.

As for Google using Linux or Solaris, it certainly would have been a PR boost for Sun, and one way or another would have improved Sun's position while denying Linux important resources (contributions from googlers).

Anyways, these things didn't happen.