Stalkr is an iOS app which logs locations (independant of an internet connection), and then allows you to upload it one big batch to the Google Latitude service (for now).

Why would you want something like that? Perhaps you don't have a data plan, have an iPod Touch or iPad wifi model, or maybe you are travelling and don't want to pay for expensive data roaming costs - but you would still like the ability to log data historically.

How does it work? Depending on your settings, it can passively monitor your location or actively monitor your location. It has the capability to run in the background too if your device supports it (and you opt-in). Finally, whenever you are ready (which is up to you), you hit the upload all button and it will upload everything to our service which will post it to Google Latitude. Click here for a more detailed FAQ

When can you have it? It is now available on the iTunes AppStore. It will support iPhone 2G/3G and the latest iPhone4 (Which is most recommended as it has the most features). iPad native support isn't in this version yet but it is on the cards for the next version. It will be available for less than a cup of coffee.