Please add new sightings of Microsyntax, below:

Ev Williams suggested on Twitter (5 June 2009) that tweeple in SF could direct of-local-interest posts to @SF. Not clear if this is a recommended generalized practice, or not.

Stocktwits use of '$' and '$$' for stock tickers and general messages.

Cotweet CoTag '^' as a convention for identity for corporate Twittering.

Geoslash or /location, a geolocational microsyntax suggested by Stowe Boyd.

Whispers, using '!' as a way to indicate messages should be directed to your 'inner circle', suggested by Chris Messina.

Twitterdata, a generalized model for embedding data in Twitter with type indicated by a leading '$', proposed by Todd Fast and Jiri Kopsa

Microrevie.ws, uses ';' to delimit somethign being reviewed from the comment about it. Also proposed 1-5 '*' as a rating

Dopplr uses natural syntax to recognive travel plans, requiring no specific microsyntactic punctuation, but requiring the careful use of prepositions like 'to' 'on' 'to' and so on. This comes in three forms:

1. A trip to Helsinki on May 19 to May 23
2. At SFO on September 9th. Leaving on September 20th
3. I'm going to Austin on July 15 for 3 nights

Peqipedia is a wikipedia-like project where all the entries are 140 characters or less. Entries are defined in Twitter by messaging to @peqi, and the '=' sign connects the defined term (left) with a definition (right), like '@peqi Talinn=the capital of [[Estonia]].' The double brackets indicate that 'Estonia' is another entry, and a link should be created.