For all those with a free data limit on their mobile phone, check out Google Map for Mobile.
A nifty way of keeping yourself occupied while bored someday, and the satellite images for Dublin are great. Find at: Google Maps
And a new nifty site I found yesterday that's awesome for checking out address and location details in the UK. From Yahoo, they seem to have hooked up with a directory service and linked every single address onto their mapping software! Awesome for finding out where the nearest campsite/restaurant/etc. for a location you're going to. Check out: Yahoo Local