To be colleagued
I think there needs to be a new word in the dictionary, to describe those times when a colleague comes over to your desk and takes time from you. Actually, it might not be a colleague, and they might just take time from you in some other way, like via the telephone or an Instant Messaging system.
Obviously when someone colleagues you, it's urgent to them, and you have to treat it urgently too. It stops what you're doing for a few moments. It's not a bad thing - sometimes it can be just what you need to get a fresh perspective on the work you're doing, but it's definitely something which I think needs a verb. "Interrupted" doesn't describe well, because it has negative connotations. And besides, you could get colleagued for a long period if someone drags you into a meeting.