When I applied for a job in Northern Ireland, two things surprised me. One was the insanely high house prices (there really should be a much higher price differential between Windsors Belfast and Berkshire...). The other was the equal opportunities question on community background, which asked for your school of origin if you declined to give your community of origin
One positive consequence of this nosiness for off-island incomers is that the Northern Ireland Neighbourhood Information Service (NINIS) is far more useful (though less pretty) than upmystreet - it gives info on percentage of renters and OOs, relative measures of crime, environmental quality, employment and education levels, car ownership and use, and allows you to map all sorts of indicators. I use Firefox and add-ons called 'Add to search bar' and 'Context search' to bring up neighbourhood data by right-clicking on a postcode. The site was down for a couple of months, but now it's available again.
Also, Noise Northern Ireland, the local response to a recent European directive on environmental and noise pollution, is full of surprises, with good - if slow - mapping.
Oh, and though upmystreet is crap for NI, aboutmyplace is a bit better. At least it has a decent interface to Windows Live Local's bird's-eye-views.
Still don't know if I'm moving to NI - I might find out next week... even if I don't end up 'round Belfast, I'll be moving house soon, and I've learned a lot on the NI HPC forum. Hope this post helps someone (by way of returning the favour)