If you want some deep information from 23andme, there is promethease, but I'll warn you up front you'll find lots of scary things (everyone does). It's a no-holds-barred approach to SNP interpretation. Some people feel it's better to not know, but I'm not one of those people. (I'm more like Pandora with a closed box. =P )
I think there may be many things in your genetic code more interesting / relevant to ME than the methylation cycle - but if you just want methylation info then do what taniaaust1 suggested.
Another fun / interesting site is interpretome (produced at Stanford). It has a lot of cool stuff you can do with your raw data, including a longevity predictor (of highly questionable accuracy!), a predictor of diabetes risk, and other fun stuff that isn't scary at all (how neanderthal are you, are your genes mostly in positive or negative selection, etc). Also gives some info about how you might react to drugs. It can also impute some SNPs.