If a big set of codenames leaked by CrackBerry yesterday can be believed, RIM's 2012 roadmap for BBX devices is looking pretty full. In addition to the BlackBerry London, which we've already seen, apparently RIM has at least four more BBX-based devices on tap for 2012. Supposedly coming in March, the BlackBerry Milan looks to be a variant of the BlackBerry London, perhaps slated for GSM networks. There's also the BlackBerry Nevada rumored to hit in November, which may be a BBX phone in the traditional portrait-QWERTY form factor. The BlackBerry Lisbon is more of a mystery than the rest, but it bears noting that none of the other rumored devices account for the slider form factor. Finally, CrackBerry has pegged a 10-inch BBX tablet as the Black Forest, which is purported to leave the bland PlayBook looks behind in favor of the angular lines we saw on the London.

That is a lot of names to keep track of, so it will be interesting to see if RIM will to keep to the schedule laid out here. Given how poorly the PlayBook appears to be doing, the company is going to need more than one of these BBX devices to be a hit.