Jedi,
As you may or may not recall, I'm my portfolio is HEAVY with vlog-related domains. I jumped in with both feet once it seemed that the term was catching on. I track google and yahoo, and the frequency of use has increased steadily over the last year. Especially in news/media stories, which I think bodes well. For a while I was concerned that other video-blog terms would win out, but now it looks like "vlogging" has the momentum. Cross your fingers and toes, I guess!
So yeah, I like your .mobi... wish I'd snagged it!