It looks like Sprint is getting ready to drop a new BIS add-on plan for its BlackBerry subscribers. Beginning November 4th Sprint users will be able to select a $30.00 BIS BlackBerry Power Vision package. This is one hell of a package, sporting unlimited web browsing, email, IM, Sprint on Demand access, Sprint TV, Sprint Navigation and more. It also lets you rock out with unlimited text messaging! A comparable plan from T-Mobile, the previous budget winner, would run you $34.95 including the unlimited SMS. Sounds like a steal to us. The plan does not, however, allow for tethering. That feature will run you an extra $15 a month. Even so, we think current and prospective Sprint ‘Berry customers are going to be happy today.