I would be very grateful! I've already mapped FFN to Ctrl+O, which is why its (short) absence from ST3 crippled me. I would have no problem doing the same for Ctrl+S, but you would need to provide an appropriate command. I looked into writing it myself, but it's a little beyond my capabilities.
I can use the menu if I need to use my OS's filesystem dialogs (or make appropriate commands for the palette).
FWIW, I started learning Colemak on Thanksgiving (you can imagine what fun I must have been having! ). I practiced for a couple dozen hours to get all the keys down and then it was a matter of training my muscle memory. I was doing around 20 WPM when I began confusing Colemak & Qwerty, thus necessitating switching 100%. (This was at the beginning of January. I should mention that I had a two-week hiatus from all keyboards just prior.) That was painful until I hit 30 WPM, which is about the minimum I can tolerate. I think I'm at about 40+ now (a far cry from the 90ish WPM I had originally), but I like Colemak thus far. I should also note that even though I was very fast, I did not know how to touch type.
Speaking of win, did you ever find a solution to using Colemak with Vim bindings in Sublime? I am a Vim virgin (or is that a vimgin?), but I don't see how it would work with Colemak. Do you remap HJKL to HNEI? If, so, what do you do with N or I? Et cetera...
Edit: typos and silly things