not too good, imo.
i think .mobi is yet to be decided.
so are e, i, m, v prefixes, but riskier still.
it seems m-commerce and mbusiness are accepted in articles
i have invested somewhat in m's and i's.
i think eticket, ereceipt, ecoupon are all pretty good.
i think the e-'s of those are worse, but decent even
buzz was tmobile was scooping up t's and t-'s
etkt isn't that bad as a four letter and abbreviation, maybe xx+
but an e with a hyphen and abbreviation, don't feel it.
i do see where you were going and agree logically its quite good.
so, reg fee.