I can see it's value - I do consulting work (web design / marketing) with small businesses and I often spend too much time getting Google Maps to embed just right into the site. I'll try this out on my next project.
It seems to fit perfectly for Craiglist ads. For anyone wondering, here's what the output on Craigslist looks like: http://ka1.us/ZlzK
# Comments / Suggestions / Thoughts
First off, serious props for launching this. It's a wonderful application and I can't wait to see where it grows to. As far as this feedback goes, I'm not you, so take these ideas with a grain of salt.
Custom URL
It would be neat if I could set a custom URL for a location. Linking to http://lg.cx/YRDYhVuq is fine, but it'd be a lot more user friendly for me in my use case (including a link to my house in a party-invite email) if I could set that as http://lg.cx/kaishouse
Registering / Owning / Locking Locations
Can I lock a location or are they always open to editing by anyone? I'd hesitate to use this for a client's website if someone can go in and change the listing description and name. Not a biggie, but something that might come up for business customers.
Copy to Clipboard
Including a copy to clipboard for the embed codes (pic: http://ka1.us/Lfo5) would be great. I'm not sure if it's a bug on my end, but when I clicked into the embed code boxes, they'd flash for a second like they were being highlighted to copy, but would immediately reset to normal. Nothing was copied to my clipboard.
Copying the Craigslist ad was a bit awkward. Half the time my mouse cursor would end up outside of the box and cmd+a would select the entire page. Adding a 'copy this embed code' button for both boxes would be nifty keen.
Sharing
Minor, but an 'email this' button could be nice. Click the button, enter an email address (or multiples) and an email is sent with the table output of the address.
Maybe have the share menu expanded by default? I'm used to 'share' displaying twitter / facebook widgets, so the link code in there came as a bit of a surprise.
Again, congratulations for making + launching this. I think it's really awesome.