Oceanfree/Mapflow has an excellent mapping tool here:
Now it may just look like maps, but keep zooming in and it surns into aerial photos. Hurray!!!
There's also terraserver:
It used to have Dublin but my Mac frickin' hates it these days so I can't check...
And does anyone have any more aerial photos they want me to scan and upload??? You get your name on the page and lots of links and stuff...
(copyright of the aerials on my site!!! at the moment paul it is indeed slightly unkown, but all the 1980's balck and white ones are safe. and hey - it's for the good of the human race!!!