Hello fellow friends of the functional!
Aside from the newcomers demand for usable stuff there is the not so occasional demand for *category theory* (yes really).
I took a seminar at university, when I studied mathematics and would be willing to prepare something.
DISCLAIMER: I don't know how much applicable this is in your everyday work or if I can bring any practical examples. So bring a pack of dextrose to enhance brain functionality and maybe a beer or two to moisturize the rather dry topic of functors, categories, duality and whatnot.
If you have any experience or concrete topic suggestions, please leave a comment as it makes my life preparing a whole lot easier. Also if anybody else wants to give a second talk (hint hint).