There are a lot of firms offering the software you probably need on an ASP-basis, with a shared database and access via Internet from wherever you are, payable on a variable fee (transactions done, Mb used, etc). No problems with programming, synchronizing data, software maintenance, new versions and the like, just use it.
One can't say much more without knowing both your country and your needs. Ask collegues or your business advisor or search google using terms as ASP CRM to start with. Lots of hits here, including sponsored links.
Good luck with your business.
Kees
My cohorts and I are considering a business and would like to keep our merged database updated regularly. This would be from a marketing standpoint and our ability to see additions, notes, etc. on a next day or two basis would be great. The four of us travel and all have good laptops (<1 year old) and I would be willing to allow/send/zip/download info or allow access to them for the dbase only. Is there software that would accomplish this? or is there a better way to go? We are on a tight budget right now but that could change...<$400? We currently use ACT but I am not married to that either.
Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic