I just stumbled on http://www.cs.purdue.edu/spgist/ which seems like exactly what I need.
It doesn't work with 8.2 and up, because since 8.2 index should take care about concurrent access itself and that implementation doesn't do it.
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Teodor Sigaev E-mail: [EMAIL PROTECTED]
WWW: http://www.sigaev.ru/
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