My sweetie and I have been doing a variation on this theme for a bit.
Before members of the Reserve regiment I used to belong to were over for me to send stuff to, I found names using a good CF resource: Combat Camera.
I was interested in sending magazines and goodies to an infantry section working in Kandahar, so what I did was go to the CF Combat Camera search page:
http://www.combatcamera.forces.gc.ca/common/combatcamera/find_e.asp
and typed in "Sergeant" and "Kandahar". Checked out the names on the captions, used my head re: who might be doing what, wrote to the standard address with their name, and they got the goods! Kept in touch with a patrol company section for a while that way.
This past ROTO, I sent some goodies to an engineer section whose name I got through a senior officer who I used to be in Air Cadets and the Reserves with. Now, in addition to sending goodies to members of my former Regiment, the Engineer Sgt. has asked if he can pass along the name of his replacement to keep in goodies. I told him since even Sappers need love, we'd be happy to
Something I've learned (although probably not news to Army.ca types) is that the goodies that don't get used make their way, in a kharmic fashion, to cheer up other troops. In one case, when some troops we'd sent goodies to pulled the big "resupply the surrounded Brits" op, they even gave extra mags to them.
Not to mention that you can now send Tim Horton's gift certificates to the lads and lasses (when you buy them, tell the counter staff where they're going - everyone I've told has been impressed).
Hope this helps.