The first mainstream Caller ID spoofing service, Star38.com, was launched in September 2004. Star38.com was the first service to allow spoofed calls to be placed from a web interface. It stopped offering service in 2005, as a handful of similar sites were launched.
Our thirst for more Internet seems to be insatiable. According to the latest data from broadband network solutions provider Sandvine, fixed network data usage increased by 120 percent in the past year in North America. The average household now uses about 52GB per month, up from just 23GB last year.
This is really very interesting question but i am sure average data usage on blackberry really depend on the usage of services of mail, gprs etc. If you are a really mobi user and all the time you are on the mobile may be you required 5 MB per day. Not sure still as it totally depend on your usage.