The blog is integrated into the DDL's database. That should not be affected at all.
I'm not sure, I will have to take a look at what needs to be done first. I'm estimating about $50 max. DarkDDL was using the same database as DDL0, therefore a lot of the code was removed/edited, I'll need to re-code everything to allow DarkDDL to work as a standalone DDL.