Well done Daniel, way to welcome a new member.
Francis, you can bomb whoever it is you want, no need to have attained a specific level or points total. The only thing is you won't get to see other Geeks addresses until you reach a specific amount of posts or points (i don't recall exactly) but that can be solved by asking other geeks for the address you are looking for.
As far as bombing your bomber, there is no rule against it although reciprocity isn't the reason why a Geek bombs another. No one will give you grief for sending free cigars to another member.