There are several ways to make blackberry tethering work in Ubuntu but none of them are anywhere near user friendly. Simply connecting a Windows Mobile phone to my computer allows Network Manager to use it as a modem. RIM has more smart phones on the market than any other company. This is a method of getting online that would benefit a lot of people!
Barry is already included in Karmic's repository, to tether Blackberry, follow these steps:
1) Install `libbarry0' and `barry-utils'.
2) Plug-in your blackberry.
3) run `sudo pppd call ppp script'.
list of scripts:
1) barry-att_cingular
2) barry-chinamobile
3) barry-o2ireland
4) barry-rogers
5) barry-sprint
6) barry-tmobileus
7) barry-verizon