I managed to install ikiwiki on eggplant farms, with most basic features except markdown.
I think ikiwiki is more suitable for VPS/dedicated server. Shared hosting doesn't fit.
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+I just (2009/04/27) installed ikiwiki on DreamHost and the CPAN instructions here are unnecessarily complicated. I used "cpan" instead of "perl -MCPAN -e shell" and had no trouble with that portion of the install. --[[schmonz]]