Lead Tracking Group Database Software?

Hi all =)

I'm diligently looking for a piece of software that can be used for a group of salespeople to record their sales efforts, and would be best if if could be accessed via mobile.

In other words, if a sales person goes out and walks into a business, I want them to be able to login to a site with a unique user id/password, and enter in the business info (name, phone number, etc...) and to record the results.

So maybe for example, the business owner says, "I'm not interested right now", or "call me in 4 weeks", they can record that so they can follow up.

The same thing goes with cold calling. It would be a way to track all the businesses in a particular area, and the contacts that have been made throughout, as well as to monitor each individual's progress.

Ideally, all sales people's information would be recorded in a central place that I could monitor to track progress, and if the sales person quits or is no longer someone I choose to have on my team, i can simply cut off their access and allow access to a new sales person in that area.

Again, if it can all be done on their smart phones also, that would be ideal.

Does anyone know if there's a software program or hosted solution that does this?

Thanks in advance,

Russell =P