SBS Companyweb 'General Documents' Best practice question

I am learning how to get the most of Companyweb on our SBS2003 Standard Server, with a view to possibily replacing remote users having to map a drive to the Shared Folder across their client PPTP VPN (yep which is very slow for them).

Is the idea of Companyweb to replace Mapped Shared Drives?.  

Further, Is it a good practice to migrate a current shared folder of 50GB of general word docs, images, etc into it?.

Is there a limit to the amount of data that can be stored in Sharepoint on a SBS 2003 standard server?. Does the usual MSDE 2GB limit come into play?

PS - Are there any publicly available SBS sharepoint sites so I can see what other people achieve with this solution?

Thanks alot for help
Best
Wilson