I have absolutely no association with SiteGround outside ofbeing one of many customers, however I’ve had good success withtheir MediaWiki hosting so I thought it worth a mention: For a verycompetitive price, SiteGround will get you going withyour MediaWiki in no time (I get no kickbacks orcommissions for mentioning this, but propose it as an alternativeto the previous entry regarding setting up MediaWiki on IIS). Theirservice is quick and the hosting is reliable, and they’re somewhatof MediaWiki experts.
While in the spirit of giving shout-outs, http://www.isqsolutions.com/ isa fantastic host (again I get no benefit from recommending them).They host yafla, and have doneso to a close-to-perfect degree of reliability. Their offerings arefeature rich and their prices are competitive, and they’re veryresponsive to support issues. They’re located here in the GreaterToronto Area.