I didn't make it through all seven pages of this to see if anyone had given the straight forward, easy answer to this problem. The solution is pretty easy and doesn't need any debate on how hard apple makes things or all the roundabout ways to get to your files. Sometimes you just want access to your original files.
In finder, go to users->yourusername->pictures->
Right click on the "iphoto library"
Select "Show package contents"
That will open up a new subfolder. All of your photos are probably in "Masters" or "Originals" depending on what version of iphoto you are running.
Hope this helps.