Completed upgrading mediawiki from 1.4.x to 1.6.8 earlier today. One more long pending todo off the list.
http://shankerbalan.net/wiki/Main_Page is now back online. Also enabled the automagic URL rewriting so that the URLS look like http://mywiki.site.tld/wiki/Article_name instead of /wiki/index.php/Main_Page
See http://meta.wikimedia.org/wiki/Rewrite_Rules
My provider is still on php4. Does mediawiki > 1.6 work well with php4? I went with the legacy version because the documentation claims it needs php 5 or later.
http://www.mediawiki.org/wiki/Manual:Upgrading_to_1.7#Check_requirements
http://www.mediawiki.org/wiki/Manual:Upgrading_to_1.8#Check_requirements