Let's cross that bridge when/if it comes.  I don't remember seeing or hearing from a public face for DogeCoin.  Karma is karma, it doesn't even need to be explained.  Try asking anyone other than someone on reddit what Doge even is?   Is it the dog?  Is the comic sans colorful fonts and choppy Japanese anime style something lost in translation blurbs?  seriously I am all about being prepared, so if there is anyway I can help let me know.  I have a full time job though so the fact that I am an investor and not actually a hired rep of Karma mine or anyone else's comments will be somewhat, actually, really biased.  If it were to go big time we will have to hire a PR company to handle some of this workload.  

Kos has it right with this list
1) Put together a press release (with media contact at bottom).
2) Polish the website and make it clear and easy to understand for new visitors who know nothing about Karmacoin
3) Choose a logo with wide appeal (even if not final)
4) Decide on a mission statement (I've made a post to the karmacoin project subreddit. If you've access please read the stickied document)

Also I would add a tip bot.  Can someone here tackle or at least find out how to set one up? bitcoin dogecoin nxt and many others all have tip bots.  everyone likes free coins, and nothing better than sprinkling 500 to 1000 Karms a pop all over reddit and /r/bitcoin.   Will go a long way IMO.