If we believe the words of Boy Genius (I do believe infact), RIM is planning to announce two more Blackberry handsets by the end of this year. The first model will support WiFi and will have the make like that of Blackberry 8700. We can expect its release at the Christmas time.
The other model that has been confirmed is QWERTY Blackberry by the name of Blackberry 8200 that will boast the similar specifications like Blackberry 8100 except for the built-in camera and extra RAM. The 8200 will possible be colored in black and will share the size of Motorola Q.