Try the general BBC news/current affairs area. I haven't heard her do a report for a while be she might be working on an in-depth story in a war-zone - it's quite typical for reporters to go undercover for a while if that's the case.
I saw her about a month ago reporting on something. Not sure about a fan address, email the BBC. You could write her a nice letter asking politely for a signed pic, I'm sure she would be flattered. By the way I just found out shes on ITN news now.