A suggestion and a question:
I noticed that even though some other common, non-writing-specific abbreviations/acronyms/initialisms like FYI and IIRC are present in the list, IMO/IMHO (in my (honest) opinion, depending on the form chosen) isn't listed there.
Also, is there a reason NaNoWriMo is repetitively spelled out as "NANOWRMO" in the dictionary? Thrice in a row, so I suspect it of not being a typo...still, since the subforum linked to uses the version with an i in it, it looks a bit...strange XD
(Also, I hope that due to this being a suggestion/question thread, it's acceptable for me to post here approx. a year after the last post? If not, 'pologies and please feel free to delete my post)
EDIT: And another suggestion--POD, or Print on Demand, isn't in the list either.