According to Ubuntu announcement site, the next version of Ubuntu 8.04 will be called Hardy Heron. More Details…
“Announcing the Hardy Heron (Ubuntu 8.04), the next version of Ubuntu that will succeed Gutsy Gibbon (Ubuntu 7.10, due for release in October 2007). Not only will the Ubuntu community continue to do what it does best, produce [...]

IPTraf
IPTraf is a console-based network statistics utility for Linux. It gathers a variety of figures such as TCP connection packet and byte counts, interface statistics and activity indicators, TCP/UDP traffic breakdowns, and LAN station packet and byte counts.
Features

An IP traffic monitor that shows information on the IP traffic passing over your network. Includes TCP [...]

While not the answer to every wireless security need, WEP can still be effective if used properly.
The 802.11b specification provides a form of encryption called Wired Equivalent Privacy (WEP). It operates on the Media Access Control (MAC) layer, which is part of the Data Link layer of the OSI model. When using WEP, only clients [...]

Originally, the most popular firewall/NAT package running on Linux was ipchains, but it had a number of shortcomings. To rectify this, the Netfilter organization decided to create a new product called iptables, giving it such improvements as:

Better integration with the Linux kernel with the capability of loading iptables-specific kernel modules designed for improved speed and [...]