A supposed 2009 Blackberry Roadmap posted on TmoNews Forums suggests that we'll not only be seeing the Curve 8900 next year, but also a touchscreen Bold and a Storm with a slide-out keyboard.
Forum moderator Godzilla posted the roadmap, which offers minimal details actual specs. It only says that the touchscreen Bold (9900, codename "Pluto") will maintain the same form factor and keyboard, and that the Storm slider is unconfirmed and targeted towards Europeans. which in addition to the aforementioned phones, also makes reference to HSPA and EV-DO versions of the 8900 (referred to as the 9220 and 8930, respectively), a 3G Kickstart, as well as an EV-DO/HSPA Bold. There was also talk of a refreshed line of Pearls with the new UI. The EV-DO products are due for a release in the first half of 2009, while the potential heavy hitters are slated for a release at the end of 2009. [TmoNews Forums]