Unfortunately for the developers of Dave, Snow Leopard has largely made it redundant as OS X now supports Exchange and Windows 7 has made it even easier for parties on both platforms to communicate.
However, for all those without Snow Leopard or Windows 7, DAVE v8.0 provides bi-directional file and printer sharing services for Macintosh systems in Microsoft networks. DAVE uses TCP/IP protocols instead of AppleTalk meaning that no further software is needed on the PC users side. Note however that it requires a lot of NetBIOS and TCP/IP configuration on the PC users side for which there are instructions and it's not that complicated.
However, some users have reported that they've been unable to get DAVE to work properly and haven't received the best of support with it so you're best advised to either upgrade to Snow Leopard or find some other way if you need to urgently connect to a PC.
DAVE should probably a last resort for those that need to connect to a Windows network and don't have Snow Leopard or Windows 7 to rely on.
