I didn't realize that either! Although it just took me a while to find any that did, and even those that do are not very useful. For example round brackets, I cannot seem to hold down any key to get that character.

My biggest grips is 'n'. I keep conjoining words with n because it seems as though I hit that rather than space. Then autocorrect makes matters worse is that it figures it out and rather than breaking the words, it instead keeps the last word and drops the first. This is harder to spot when proofing than if it had just left the conjoined word alone.

I mainly use the blackberry for anything typing heavy.