Some useful links for touring cyclists:
About cycling in N. Ireland — Cycleni... Best overview on what's happening in cycling in N. Ireland.
A glossary of cycling terms — what do they all mean!
Cycling in Monaghan — The lads featured are certainly not tourists, but useful non the less.
On Brook Saddles — All there is to know about the classic Brooks leather saddle.
Sustrans - largely about urban cycling but still useful — Creators of the National Cycle Network... The network consists of, 65 km of urban traffic free, 51 km of urban on road, 120 km of rural traffic free and 1140 km of rural on road
The CTC homepage. — The largest cycling organisation in the UK!