Hi Keith,
the core Blog module features the online HTML editor called fckEditor that is provided by DotNetNuke. It is very complete and easy to use, it can be used to edit entries and summaries. A BBCode editor is slightly different: only a reduced set of HTML tags are allowed, and are usually introduced by [rectangular brakets]. These editors are usually used in forums because administrators don't want their users to break the forum's layout with too much HTML. But bloggers generally do need much more freedom.
This said, I think that this module would suit your needs, and get blogging up and running on your install in a few minutes.
Best regards,
Dario Rossa