Just Received the A30 update today in Comcast of Union (NJ). The ESATA Port was enabled on my Motorola RNG200N as well.. I should also note that there was NO official announcement from Comcast on this feature deploying in NJ. I believe they originally said sometime in March for NJ.
I think it was said "by the end of march 2013" so I think it would be taken as "from this time until sometime then" which would be a two and a half month leeway?
Anyway congrats on your update and eSATA enabling! Do you plan on using an external drive? If so what kind? If you don't know would you like assistance? I've sorta become the field expert in them lately :P