The sift program that is used by bundler does not seem to be free software [:

"This software for the detection of invariant keypoints is being made
available for individual research use only. Any commercial use or any
redistribution of this software requires a license from the University
of British Columbia."

Any idea if it is still possible to do anything useful without sift?

Sounds useful but could you post a Base64-encoded version? I can not figure out how to copy the script to file without breaking indentation. Maybe this has something to do with the validator errors

*** Errors validating http://www.openstreetmap.org/user/ChrisB/diary/4143:
***
Error at line 21, character 8: document type does not allow element "pre"
here; missing one of "object", "applet", "map", "iframe", "button",
"ins", "del" start-tag
Error at line 31, character 103: end tag for "pre" omitted, but OMITTAG NO
was specified
Line 21, character 4: start tag was here
Error at line 90, character 12: end tag for element "pre" which is not
open