Ofcom has done a report on broadband uptake in the UK. They felt the Irish Gaelic, Ulster Scots and Welsh Wikipedias were worth mentioning in particular.
http://ofcom.org.uk/research/cm/cmrnr08/ http://ofcom.org.uk/research/cm/cmrnr08/nireland/ http://ofcom.org.uk/research/cm/cmrnr08/scotland/ http://ofcom.org.uk/research/cm/cmrnr08/wales/
http://www.theregister.co.uk/2008/05/22/ofcom_broadband_region_survey/
- d.