Yes, Blotter can be used with The Hit List. The only thing you need to do is to enable iCal synchronization.
Go to the preferences pane in The Hit List and select the tab 'iCal Sync'. You can now configure what you want to sync with iCal. When you're done setting this up, Blotter should be able to see the data in the To Do section.
If you can't see your items in Blotter, take a look that you can see them in iCal. If the items are not in iCal, you need to revisit the settings in The Hit List, as there is no way Blotter can see the items if they're not in iCal.