Here's something really fun you can do with in-world snapshots:
Instead of uploading the picture you took, select "Send a postcard".
Send your snapshot to "pics@slpics.com".
Watch your image appear at sluniverse.com!
MORE fun:
If you make an account with sluniverse, you can send your postcard to Flickr at the same time!
Then it's easy to add your pic to the Meatspace Flickr group :)
Twitter: Follow "meatspaceweb" on Twitter, wait for meatspaceweb to follow you, then send tweets in the format "D meatspaceweb YourMessageHere" - It's called a direct message, come on, grandma!