I have a signal booster
for my home, but for coverage all over, in every room!
I purchased it from i think it was Unwiredsignal.com
... I'll make sure... Yup it is... wasn't cheap though, but of course you get what you pay for. Definately worth it. I just noticed they have a C-Booster for the blackberry curve... if thats of any help to any one else...
They have a lot of ways to boost your current signal. Of course if you don't have atleast a weak signal it won't help.
You should do your research
on every brand there is out there to see which one you feel is right for you.
I did all my research and I found that the Wilson Electronics
was my best option.
On their site theres also a page where they compare brands of boosters... I think its Wilson VS The Competition
Hope this helped.