A recent question on the Getting Things Done (GTD) Virtual Study Group mailing list related to tracking travel related task & project items, reminded me that since this past summer I've been tracking geographical items of interest, reference, and someday/maybe items using Google Maps:
The My Maps feature with Google Maps lets you create your own pins and references. You can also make your maps public or private. If you make a map private you can still send the private map as a link to someone else via email.
I like this option because the next time I'm in Atlanta I'll know the options that are available to me. And the data is available with any Internet access plus browser.
I've also used this feature to build a Visiting San Diego Map for friends and family:
This has been very handy in helping visitors figure out what is available to do in San Diego County and how far away items are.