An item of note about the checkbox in the PPTP setup labelled "Use Default Gateway on remote network" - I always uncheck it because I'm such a "multi-tasker" and I really don't want ALL my traffic (web, ftp, ssh, external mail, etc, etc.) going through my remote workplace's overloaded net connection.
Also, I wouldn't like to trouble them with strange un-work related entries in their "where have our employees been online today?" log.
G