~$265 is the business class fare.
I am the person who started the "my last bj-sh flight ever" thread shortly after hsr was launched, but I have since moved back into the plane camp because I get bored during hour #5 on the train, and the food smells nauseate me.
That having been said, for any Beijing trips during the next two months, I will likely use the train; flight delays are really bad in July/August.