Yes, I've met up with several opposing faction members. In fact, I was taking over a portal today when one I know well pulled up, smiled, waved, and waited until I was done with my attack before chatting.
Of course, he was smiling partly because we like chatting with each other, and partly because he had exciting news... He is now level 8 and wanted to make sure it was one of my portals he broke through on.
I also saw an l8 burster in action. Holy crow. I need to get another 475,000 points in a hurry. I want me some of that boom-boom.
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