I have a suggestion for the forums layout:
Header : Mobile Devices
SUB forum: Blackberry Devices
Sub Forum: Tour 9630
Seperating them down to the phone model will help not only your customers find their answer more quickly but it will also help the mods find the sections faster.
Just my .02 cents
While i agree with most of your statement, as far as people dont look. I just recently joined the forums and speciifically wanted info for my Tour, i had to wade through numerous pages for information on just the tour.
i think that people once they figure out where to post for their specific devices they would like it much better. I am an avid gamer and when i go to the forums it easier to find information that is broken down into sections.
Try going to the relevant board, such as Mobile Devices, and using the search function at the top of the page. Enter as specific a term as you can, for example "Tour texting problem", and then choose "on this board". That will take you to the threads which have those keywords.
I applaud you and your patience that allowed you to wade through posts before making your own!!
Now, what I really think would help is a MANDATORY period for new users not allowing them to post. Where they can only search the forums and if after 10-15 minutes of searching they don't find an answer then they can post a question. Ah, wishful thinking though.
But yes, search by tags. The Doc and myself do a pretty good job of tagging the good posts, so if you do a search by some keywords you should get a few relevant topics.