We recently upgraded / enhanced our store front with the Blog addon by Cart Taki.
The default buildin simply was not enough for us anymore and we shopped around, finally we decided for Cart Taki.
Giang from Cart Taki has not only provided us with the module but when we had issues getting it to work properly. Giang was very quick helping us out and he even styled the blog to the theme we employ (Graceful by Cart Power).
If you are looking for good blog addon, Cart Taki should be on you shortlist as well.