Hours before Sen. Barack Obama was due to deliver his acceptance speech in front of thousands at Denver’s Invesco Field, GOP Sen. John McCain posted a video on his Web site congratulating Obama on his historic nomination.

“How perfect that your nomination would come on this historic day,” McCain says in the video. “Tomorrow, we’ll be back at it. But tonight senator, job well done.”

Meanwhile, McCain is generating his own buzz as speculation flies over his choice for running mate. News agencies reported Thursday that McCain had made his vice-presidential candidate pick and would appear with the person at a rally in Dayton, Ohio on Friday morning.