In work recently we've been considering putting our blog on a sub-domain as opposed to embedding it into the site.
So the URL of the blog would not be:-
I've done a bit of research in this area and many specialists advocate putting it into the site.
An example of this sort of advice is found here. Although the logic is solid sometimes you want to separate sites with a different theme, also on a sub domain we have more creative freedom. So I took the decision to host on a sub domain.
We opted to go for Home Style as this was in line with the furniture theme of the site!