Mobile
A mobile edition of a web service is one optimized for worn devices like PDAs or cell phones.
CNN for instance has a very well developed mobile edition.
software supportEdit
The tikiwiki wiki software uses HeeHaw to support mobile on all wikis. Mediawiki has no such capability.
en.wapedia.org is a Wikipedia (MediaWiki) to WAP (versions 1 and 2) and PDA version - this is not however very flexible. Rumour has it that Florian Amrhein, the developer and provider of the wapedia-portal to WP is going to release the code under a Free software license sometime soon. Perhaps he would be best to just integrate with HeeHaw.