The open source free software world once again proves better than the locked-down proprietary world on truly wanted features with Tomboy: http://www.gnome.org/projects/tomboy/features.html

Wireless suddenly stopped working on my mother's Ubuntu-ized HP laptop.

It's the lousy hardware all by itself:
http://en.kioskea.net/forum/affich-11226-hp-dv6000-wireless-problem

It's the bad integration with Linux:
http://ubuntuforums.org/showthread.php?t=949341&page=2

Would appear to be the case. It's an update that broke it.

http://f-spot.org/Main_Page
- may be safest-- as the default on Ubuntu, this should be expected to be the one that at the least has the most migration scripts written for it eventually to better options!

RawTherapee
http://www.rawtherapee.com/

Rawstudio is an open-source program to read and manipulate RAW images from most digital cameras.
http://rawstudio.org/

Installing Ubuntu Hardy Heron on a new HP Pavilion dv6910us

could not resolve security.ubuntu.com

At least one other person temporarily got that error back in 2007:
http://ubuntuforums.org/showthread.php?t=441877

http://wicd.sourceforge.net/download.php

deb http://apt.wicd.net gutsy extras

install thunderbird on debian