There is also no hard limit to the number of simultaneous users who may access the SSL-Explorer VPN server. The limit depends only on the performance of the system you choose to install it on. As a guideline, a P4/3Ghz machine should be sufficient for 100-150 users.
3SP intends to conduct more load testing before the Gold Release of SSL-Explorer, so this guideline may not remain the same as the software evolves.