I got a big wad of super-cheap Antonio Fermins today, and set up some infusions myself. I got some airtight cannisters, and added cigars with the following:
1) Meyer's Dark Rum (in a cup, soaked into sterile gauze - cigars are not touching liquid).
2) Kahlua (same setup).
3) Fresh-ground Columbian coffee.

I also plan to set up more "batches" to include Gran Marnier, Homemade peach brandy, and homemade coconut rum. I will let you all know how this works out in a month or two.
NOTE: I plan to re-humidify these before smoking, and I am keeping a few "plain" as a comparison.