Thought you guys might be interested in this. Based on 100K .NZ web sites we have built some stats around web hosting companies market share.

Obviously this isn't perfect, a number of web hosts that don't have their own IP ranges (OpenHost for example) are included in their providers count.

However it makes for interesting reading and it's great to see a high percentage of sites are hosted locally:

http://www.sitefinder.co.nz/tophosts/