What is difference between Windows Sharepoint Service and MOSS (Microsoft office Sharepoint). If I have the WSS 3.0 installed in my machine, I can create a sharepoint site, using Sharepoint Designer and Inforpath. Then why do I need MOSS 2007 (WSS 3.0 being free for download).
A lot of the added functionality (and improvements, seemingly specifically with Search at least) are gained from MOSS2007. Have a nosey at the full feature comparison on the MS site for further details maybe.
http://office.microsoft.com/en-us/SharePointtechnology/fx101758691033.aspx
Specifically, I think the Workflow and document management improvements are where you may get your 'wins' from. With a bit of a setup overhead initially, it can replace a number of otherwise complicated collaborative tasks which require a number of people.