No, you’re supposed to work off the name of the poster not the name in the post. So R not A.
So now it’s E.
Eonwe.
DOH!
I saw all those posts and assumed it was the reverse that happened (using the poster will repeat letters frequently because only a small subset of posters will play the game).
Omar Little
Elendil’s Heir (Ha ha - can’t go wrong - “little” and “people” both end in “e”).
Wait a minute, am I going off the right post? Gah! 
LOL, this is hilarious, this game is turning out to be more difficult than I thought.
FriarTed
Shakes
Let’s spice it up a little:
Use the letter in the Nth position (0 based) of prev poster where N=(Prev Post #) MOD (char count of prev poster)
Liberal
That is pretty difficult for people to understand, but my math would suggest
etv78
(in red because he got banned)
I would actually suggest using the submission as part of the formula, e.g., ( postcount + submission_length ) MOD poster_name_length
255 (excluding edit text) + 27 MOD 9 = 3
Hampshire
Eschereal
Elendil’s Heir
Yes, I know, but I feel safer this way.
Man, this game is way fun, Shakes!
I was told there wouldn’t be any math in this thread.
Uhhhh…Frylock?
OpalCat
Lobohan. (I think, I hope I got the name right. I’m not feeling too confident any more.)
Nobody’s Fool
Nobody’s Fool, again.
Elucidator. Also, yes, I found this thread with a vanity search.
A year and a week later:
notfrommensa
Rigamarole
Tuba Diva
Eutychus