Blogging???

Yeah I would start two different blogs then. Because google might see it as a cheat to get visitors which you won't get because you can't focus on two groups of keywords. I'd suggest you use blogger because they allow more blogs and it's easy manageable. But if you know html and the such i would go for paid hosting.

I talk about a few different subjects on my blog and it does OK for traffic (though it will never make me rich). Though if you are talking about business it is best to have separate blogs as you will get more visitors, though I find maintaining more than one blog very difficult and tend to only really concentrate on one.

A blog is type of website,usually maintend by an individual regular entry by comentary,like discription of events,or other materials such as make money,mobiles,automotive.Blogger.com is good platfarm for blogging.