http://ftp.mozilla.org/pub/mozilla.org/mobile/releases/
Download apks of mobile firefox directly and skip the Google market bs. Very useful, was a pain in the ass finding this.
http://code.google.com/p/android-notifier/
Connect an android phone to a computer so that incoming notifications are sent to the computer. Very nifty, ultra nerdtastic, probably not really necessary!
http://appbucket.net/
Some kind of alternative app market based on subscription, starts from $9.99 a year.
http://www.cyrket.com/m/android/
Access to the meta data of the Android Market on a web site. Includes links to other sites, but no download facility.
http://www.wipconnector.com/index.php/appstores/tag/android
List of android and other platform app stores. Includes the major ones.
http://peter.pisljar.si/projects.php
A Windows desktop client that allows downloading from the Android market. Requires Google username / password and some other data that appears to be sniffed off the device.
http://wiki.cyanogenmod.com/index.php?title=Full_Update_Guide_-_Nexus_One
Step by step instructions on how to flash the rom of the Nexus One. Only missing part is the udev rules for Ubuntu.
http://wiki.cyanogenmod.com/index.php?title=Fastboot
Used these instructions to unlock the boot loader of the Nexus One.
http://wiki.cyanogenmod.com/index.php?title=ADB#Linux
I installed the udev rules from this page on Ubuntu to get the HTC Google Android Nexus One properly recognised by Ubuntu.
http://developer.htc.com/adp.html
I downloaded fastboot from this page for the HTC Google Nexus One.