Excellent pointer on Slashdot on how to build your ENTIRE business on Open Source. You can either read it online in different sections in InfoWorld, or download the whole report in PDF format. Go for it!
Here are the sections:
A buyer's guide to open source
Open source provides low-cost, community-supported alternatives to commercial enterprise apps
Open source business intelligence
Low-cost alternatives to costly reporting tools will arrive soon
Open source business process management
Orchestrating SOA is a heady task, but new projects are stepping up to the plate
Open source content management
The hardest part of choosing a CMS solution is narrowing down the choices
Open source CRM
Manage sales and customer relationships without spending a fortune on software
Open source ERP
The features of free ERP packages vary widely, but some gems can be found
Open source enterprise service bus
Middleware options proliferate, but jumping ship from commercial vendors may be premature
Open source identity
Free tools can give developers a head start on advanced security infrastructure
Open source directory
LDAP servers move closer to becoming commodity items
Open source portals
Competition in the open source Java portal space heats up
Open source point of sale
Free commerce terminals lend flexibility to businesses of all sizes
Open source RFID
Free tag and EPC data management software is in its infancy, but looks promising
Open source VoIP/Telephony
Options abound for PBX applications and interactive voice response
Open source licensing offers many choices
Before you use that code, make sure you understand its terms
