I don't know if anyone else uses a 26" wheel mtb for commuting/pootling on the road but i just got these for the station bike and they are great. No tread, but pumped to 65-70 psi they give a good fast ride on the road, and come with 2 conti innertubes. Now the studded winter tyres are off the bike feels very lively:
http://www.ebay.co.uk/itm/2-x-Continent ... 5606319462