As a stand alone logo, especially if the name of the service/business/publisher is not provided along with the logo - I agree with JFrazierJr. However, as long as the logo is always used along with the title "Fantastic Maps" beside, it, using the FH initials seem appropriate.

For the sake of branding, getting people to recognize the logo you would need to consistently emphasize the logo in all your promotions, as part of your sig in various forums - as stated, if the logo is appearing alone without the added title "Fantastic Maps" - having the words as part of the logo may become important. Also, as stated, if that logo always appears with the service title, then initials will work just fine.

Personally I'd go with the logo incorporating the initials, but ensure that the title "Fantastic Maps" is always present when using that logo anywhere.

Regarding how fancy or plain of font choice, I'd say experiment - show me five different versions using five different fonts of varying style and complexity to choose from, and I'll give you a better recommendation.

For me, when you say, "Fantastic Maps" its already branded to me as Jonathon Roberts maps - but that's just me...

GP