A lot of repair shops use "Pliobond" from the hardware store. I believe "Gorrilla Glue" is much the same, but I never tried that brand. At least you can peel it off and get it apart again if needed. Some silicon adhesives work much the same. I'd stay away from the ones that harden solid (i.e epoxies, model cement, cyanoacrylates, etc.). You can find some double-stick tape too at frame shops that might also work.
Thanks G-Mack! I was looking for something like that. Didn't want to take it to a repair shop (in AUS), their "service charge" is ridiculously expensive and for this type of thing I can stick it myself... Double sided stickytape seems like a good idea
Josh - D700 ; Nikon 24-70mm f/2.8G ; SB-900