Crackstone Rib, Dinas Cromlech
The Stairs, Holyhead Mountain

Tests on the comparative strengths of ice screws and ice threads from Petzl
http://video.google.com/videoplay?docid=1863958284744514965
 

The following links are to Kolin Powicks gear testing page on the Black Diamond site.

Retiring Old Ropes - How strong is an old rope

Is my rope still ok to use of I accidentally peed on it?

Connecting two slings together

The strength of climbing harness belay loops

Testing a worn karabiner

Spectra vs. Nylon–Real World Wear

There are more links on a similar theme from each of the pages above.