There was a website out there, perhaps based on Google maps, that let you do things such as planning routes and, more importantly, add your own landmarks. There was a decent list of icons (bed, tent, pint glass, tea cup, etc) that you could use on the map, adding in comments for each marker. Though it may have been GPS compatible, I used it without (never owned such a device). You could save and share these online maps with others.
The problem is, I don't recall the name/url and can't find anything when searching. Does the above description ring a bell? Does anyone know of any similar sites?
{Moderators: I placed this here as being non-GPS specific, but feel free to move if you feel otherwise.}