It's an interesting concept - an entire timeline can focus on a single theme, unlike Twitter or FB feed.

I can see myself using this as a travel log to share with friends, _if_ I go on an interesting journey (which sadly I haven't done in a long time).

Using it for documenting progress in a hobby is also interesting. I have never done it before, so can't say I'll start now, but still it's a mildly attractive idea.

I don't see myself using this to document my career. Firstly because I don't think there's anything special about mine to document it publicly. Secondly, because it's already documented in personal journals - warts and all - and lessons learned which I don't particularly care to share with anybody. Thirdly, I don't have any great photos or anything to make my career timeline look interesting to other people.

I can't think of any reason why anybody would document their relationships publicly. Do people actually do that?

I think you should focus this product on serving travel and hobbyist communities, and market this to them.