I'm not TOO worried about msft buying yahoo, as even msn and yahoo combined aren't nearly enough to form a monopoly, but from a technical perspective it certainly would be interesting. For those that don't know, Yahoo is mainly powered by PHP/Apache on FreeBSD servers. Does anyone thing Microsoft would be willing to keep it on open source technology? Can anyone imagine how big of a technical undertaking that would be to migrate the infrastructure and code to a windows stack?