Agreed, for remote desktop / VNC type stuff then the official Microsoft client is good. Just had a look and there's a new beta version available not tried it myself yet but the older version runs fine (although this new one is a universal binary so should run better on the intel macs than the old one does.
I'm presuming the title "VPN Program??" is misleading - if not then there is a Cisco VPN client available for OSX.
There is SecuRemote Client by checkpoint but no version yet for leopard ,
but remote desktop software is different to vpn software isn't it... i was asking what the best cross compatible vpn software is for sharing files and playing games?
would like some software with the same functionality as hamachi, in that two (or more) individuals load up hamachi, then the computers behave as if they're on the same network, i.e. they show up as a network resource, you can play against them with lan games etc...I think you need to state clearly what you want to do. As VPN software doesn't do this. Also XP doesn't have VPN Server.
Do you just need to be able to access a fileshare on an XP based box or are you looking to take control of the XP box remotely. These are two different things.