I used to work at RIM, both as an intern and eventually full-time. When I first started, we had codenames like Electron, Positron, Gamma Ray, etc. Later on, after the iPhone came out, (probably not related) they decided to go with US National parks (Yawn. Also, a weird theme for a Canadian company!) When I left a year ago, every product was literally called R### (where ### is replaced by some seemingly random numbers).