i just started caching last week i have a 1st gen iphone and just look up the coordinates and save em ive found 3 caches this way so far, 2 of those today i plan on getting a handheld unit eventually the maps on the iphone isnt accurate enough the first one i found was about 100ft from the coordinates given but it is a challenge, id actually like to see how many i can find this way im the kind of person who likes a challenge