Nothing new I might hope for a network wizzard. But if your IP knowlegde is rusty or want to learn about CIDR and the likes, check this site out

A frequently occurring idea for IP tunneling applications is to
run a protocol like PPP, which encapsulates IP packets in a
format suited for a stream transport (like a modem line), over a
TCP-based connection. This would be an easy solution for
encrypting tunnels by running PPP over SSH, for which
several recommendations already exist (one in the Linux HOWTO
base, one on my own website, and surely several others). It
would also be an easy way to compress arbitrary IP traffic,
while datagram based compression has hard to overcome efficiency
limits.

Unfortunately, it doesn't work well. Long delays and frequent
connection aborts are to be expected. Here is why.

What do you get when you mix flashmobbing, beowulf computing, grid style cpu power, a top 500 computer and San Fran?

Indeed, you get a //flashmobcomputing.org. A get-to-gether-plug-in-your-GNU/Linux-box to create together on a ad hoc basis a //top500 computer on earth, for a moment at least.

A Flash Mob supercomputer is hundreds or even thousands of computers
connected together via a LAN working together as a single supercomputer. A
Flash Mob computer, unlike an ordinary cluster, is temporary and organized
on-the-fly for the purpose of working on a single problem

Both technical and socially a very interesting experiment. Too bad one needs 100Mb access to the LAN, if WAN would be an option, i definitely would donate some cycles;I do believe in distributed computing/data.

The Simple Mail Transfer Protocol was never designed for security. SMTP
dates all the way back to a 1973 extension to the FTP protocol. [ref 1]
In 1973, computer security was not a significant concern, and the
Internet architects were not even certain about their implementation of
the email protocol.

This document contains a description of the syntax of a sample ICA file so that you can manually create
or modify an ICA file if desired.