The images, BSP and workspace for Tegra modules have been moved to a new Download server. 

Please check the frequent downloads page to get the latest download links, also beta images will be available there:

http://developer.toradex.com/frequent-downloads#Colibri_and_Apalis_Tegra

Or go directly to these Links for final releases:

Image:
http://docs.toradex.com/102307-tegra-bootloader-image.zip

BSP:
CE 6: http://docs.toradex.com/102308-tegra-bsp-ce6.zip
CE 7: http://docs.toradex.com/102309-tegra-bsp-ce7.zip

Workspace:
CE 6: http://docs.toradex.com/102310-tegra-pb-wince6-workspace.zip
CE 7: http://docs.toradex.com/102311-tegra-pb-wince7-workspace.zip