Here is my start of a RasPi page - mainly this has links to the downloads for now, more soon
Guide for beginners on how to set up your SD card.
Modular Raspberry Pi Case on Thingiverse


Debian “squeeze”
If you’re just starting out, this is the image we recommend you use. It’s a reference root filesystem from Gray and Dom, containing LXDE, Midori, development tools and example source code for multimedia functions.


Note changed password!
Torrent
debian6-19-04-2012.zip.torrent
Direct download
debian6-19-04-2012.zip
SHA-1
1852df83a11ee7083ca0e5f3fb41f93ecc59b1c8
Default login
Username: pi Password: raspberry    
Arch Linux ARM
Arch Linux ARM is based on Arch Linux, which aims for simplicity and full control to the end user. Note that this distribution may not be suitable for beginners.


Torrent
archlinuxarm-29-04-2012.zip.torrent
Direct download
archlinuxarm-29-04-2012.zip
SHA-1
b84d1eaba2ec64982da40ccd7dba06b186f69545
Default login
Username: root Password: root
QtonPi
QtonPi is an Embedded Linux platform plus SDK optimized for developing and running Qt 5 Apps on Raspberry Pi. More information is available here.


Torrent
qtonpi-0.2.tar.bz2.torrent
Direct download
qtonpi-0.2.tar.bz2
SHA-1
665b6ccf59ccbd4c38827f5554aa823302730a04
Default login
Username: root Password: rootme
Thingiverse things for your RasPi:

Case one
Case two