Here are my posts that have Ubuntu as the primary subject or otherwise may be of interest to the Ubuntu/Linux community:

Why Ubuntu: Reasons why you might to try Ubuntu, or reasons you can suggest to potential Ubuntu users:

Why Ubuntu? Let me count the ways

Why Ubuntu? It uses apt-get to manage packages

Why Ubuntu? The NY Times Picked It To Represent Linux, And Said Good Things About It

Other posts about Ubuntu, by topic:

General:

Ubuntu is a hill of beans that is worth much more than a hill of beans

Sell support? Why not give it away for free?

Ubuntu Weekly Newsletter – Selected links from Jan-Aug 2007

You make the call

The LDS License: License Dave Shields

The FSL License: Fun Software License

64 Beans and Counting

What’s in a name? GNU, Linux, or GNU/Linux?

What’s in a Name? Linux, Ubuntu, Linux Ubuntu, or Ubuntu Linux?

Hardware:

Configuring Intel 845G video chipset on Ubuntu 7.04 Feisty Fawn desktop

Using the D-Link USB KVM-Switch DKVM-20 with Ubuntu 7.04

Ubuntu Forums Re: How to build a PC that is 100% compatible with Ubuntu

On Buying and Building Hardware: Break a Leg with Newegg

How do you access, read, write, or mount a USB flash drive in Ubuntu 7.04?

On Building, Buying, or Recycling a Computer to Run Ubuntu Linux

Building and Configuring Ubuntu Linux on the ASUS Terminator T1-C3 Intel Socket 370 VIA C3 800MHz On-board VIA CLE266 Barebone Computer

Building your own Linux Ubuntu computer using the ECS GeForce 6100SM-M motherboard

Software:

If you have more than one computer in your home then you have a home network

Dave Shields On Package Management: Apt-Get It or For-get It