Great news, triggers now work within our API as well as our mms/email posting methods. Which means any application that supports Pikchur will now be able to have a basic trigger system which will override your posting settings on the go! We have plans to include some pretty slick custom triggers really soon, but for now refer to this list of service triggers.
To override any of the services you are posting to simply include the trigger in the subject of your post in the following format :
To turn posting OFF for a service: -triggername-
To turn posting ON for a service: +triggername+ 
Twitter( tw )
FourSquare( 4sq )
Flickr( fk )
Tumblr( tr )
Jaiku( jk )
Facebook( fb )
FriendFeed( ff )
Plurk( pl)
Identi.ca( id )
Koornk( ko )
Totspot( ts )
Brightkite( bk )
For example if your account settings are :
- Twitter, Facebook, Foursquare, Flickr > Enabled
- Brightkite,Identi.ca,Plurk > Disabled
Lets say you want to not send to twitter but you do want to send to Plurk.
All you would have to do is in your subject/message is add the following triggers -tw- +pl+
When we recive your request we will override your account settings to match your trigger request and filter out the triggers from your message for that one upload.
We are working on some pretty neat things to be released really soon, so keep an eye out!
~The Pikchur Crew
