I haven't tried this myself but I thought somewhere on here people said they used royal icing because it dried hard. I wouldn't use pins because it would be easy to lose them in the cake, and superglue is toxic (I'm pretty sure). Someone else out there will know more than me, hopefully someone else will respond too.
Kate
Using ribbon on a cake depends on the icing you use also, I'd think.. if using buttercream, unless it were a special type of ribbon, it would absorb the grease from the icing .. not sure about fondant and ribbon use ..
I kinda thought so 
but you never can tell, sorry
If it won't be eaten, which is part of the base, anything should be ok, even Hot Glue...as long as it won't touch the cake, which is around the wood base or thick styrofoam. I make Ribbons out of Fondant and I use toothpick or skewers to attach them to the cake.
When I use ribbon on a cake I use BCI or piping gel. You always connect the two ends of the ribbon in the back of the cake where noone will see it. Put BCI or piping gel directly on the ribbon & hold the two ends together for a few seconds. It works great!
Quote by @%username% on %date%
%body%