I love the idea of mobilecasting, but I never seem to get around to it. There are a number of reasons for that and I'm going to talk about that a bit.
Mobilecasting Attracts Attention
It's really hard to conduct an interview without everyone noticing. I'm not sure if you've stumbled across an interview in progress before, but I have. Walking into a coffee shop with an interview going on is blatantly obvious for some reason. The people look out of place, their voices are too loud, and there's a recording thingy somewhere on the table.
Not a big deal if you don't mind attracting all sorts of attention, but that's not my gig.
Mobilecasting an event, however, has a totally different set of problems. It'sn ot a big deal to be noticed, but the logicstics are hard.