Maybe I'm just not comprehending what you are saying because it's before the morning coffee, but....
I don't have to use #POSH in either my twitter or HIVE post? Simply tweet about my blog and the link to my blogpost on twitter and the @poshbot does the rest?
Correct, it will pick up the Tweet and comment on the post you tweeted about automatically.
Keep in mind, other services like PoshToken and curation may require #posh tag. My bot just doesn't.