Blue Crowbar Software (http://www.bluecrowbar.com) has released
Aperture2Twitter 1.0, a new export plug-in for Aperture, Apple’s
groundbreaking photo editing and management software.
Aperture2Twitter lets you send short messages and photos to Twitter
and TwitPic from within Aperture.

You can include an image with a tweet. Aperture2Twitter also lets you
switch between different Twitter-accounts. It requires Mac OS X 10.5,
Aperture 2.0 and a Twitter account.

An Aperture2Twitter license for one user costs approximately US$8. A
free trial version of the software can be downloaded from the Blue
Crowbar web site.