Wow, reading the comments made me hungry! (except the person that suggested Club Orange; yuck!)
Even though it's still hard as heck to find a lot of things here, in my case at least, it's gotten marginally easier. Tesco started carrying Oreos in the last year or so, the EuroSpar across town has a little Tim Hortons section that makes really good Boston cream donuts, a couple of shops have started carrying both Reeses peanut butter cups and Reeses Pieces, and the Aldi in Donegal has the dinner rolls that you find in the refridgerated section in the can thingy that pops open. The only thing I'd really love to see here, since it can't be shipped, is Claussen Kosher Dill pickes. DH doesn't really have to worry about missing things much since most Irish products can be easily found in the north. The only thing we can't get up here is Liga (kind of similar to Farley's Rusks) and both my kids love them, so MIL posts us a couple of boxes a month.