XFN (teaser) visualization

Small teaser:

services.alphaworks.ibm.com/manyeyes/view/S7ipIHsOtha6i3-ZJvKJH2-

XFN visualization; entry point - site Tantek Celica. Depth of processing - 5. Podglyukivaet, somewhere 5% of pages are not processed in any way. I am writing here, but soon there will be a big article in my blog about such processing.
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At the same time, it also processes rel-tag and hCard (it is not shown on the presented map).

Under the hood - 200 lines of XSLT and fifty in Python.

+ Tidy, libxml2.