Business models based around manual check-in have so far appealed to the young (mostly males) and early adopters. These are the offerings of companies like Foursquare and Gowalla. It is an approach, which has yet to attract a wide demographic base. Meaning .. my wife has no interest or time to do manual check-ins. It is hard to imagine this being a successful approach long term, particularly without significant incentives. With this in mind it was interesting to see that Google Latitude have just added manual check-in. I usually think of Google as innovative. This seems a very reactive move by them. So they are behind in the local deals space. But copying unproven approaches like Foursquares is odd. Or am I missing something?