No, the version I sent to Sedat is in ctg (chessbase) format.

> Thank you! I actually did some work with it :)

I noticed

> I wonder if the polyglot learn feature actually works though. I have it set in online plays, but not really sure if it works.

Yes it works, the last 4 bytes of every 16 byte entry in the polyglot book contain learning information.  If there is any in there, and you have the right version of polyglot, then it'll use it. 

You need to make sure:

1) Polyglot has write access to the book (usually it does on Windows systems)
2) the booklearn=true directive is BEFORE the bookfile= directive in polyglot.ini otherwise there will be an error when the learning information is attempted to be written to the book
3) You are using the right version of polyglot

See: http://talkchess.com/forum/viewtopic.php?topic_view=threads&p=431181&t=40930

And Winboard 4.5 is here: http://www.open-aurec.com/wbforum/viewtopic.php?f=19&t=51528

(winboard contains a version of polyglot which is possibly the version to use with Harm Geet's enhanced learning algorithm).  Would need to check with him (and maybe Michel) about which is the best polyglot version to use.

For SCCT ctg book authors, Sedat gives the choice for them to ask for learning to be enabled or not, and it's possible to give the same choice to polyglot book makers,