A test rebuild of natty/main for armel is currently running. The regular distribution buildd's are used for the rebuild with the test rebuilds at lowest priority, so it will take a while to finish.
The test rebuild archive can be found at
https://launchpad.net/ubuntu/+archive/test-rebuild-20110114-arm
Build problems at
https://launchpad.net/ubuntu/+archive/test-rebuild-20110114-arm/+builds?buil...
https://launchpad.net/ubuntu/+archive/test-rebuild-20110114-arm/+builds?buil...
An overview of the build status (updated hourly):
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-2011011...
To compare with other architectures, results for a ix86 test rebuild can be found at
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-2011010...
Matthias