Update: for those linking, please use http://lightroom-blog.com/lr2twitpic
Lr2Twitpic is a plugin for Lightroom 2 that allows the user to export a photo to the Twitpic online service. As with the website, this allows you to either upload the image, or upload and post a message on Twitter, along with a link to the image. This link, the Twitter Username and the URL of the image on Twitpic are stored in metadata and accessible via the provided Lr2Twitpic Metadata Tagset (or Metadata Viewer Preset as it has been called). The image generated is an sRGB Jpeg, and is put in a temporary location, which is then deleted once the export is finished. You can of course download the file via the link if so desired. If you opt not to post to Twitter, the Message box becomes inaccessible. A Signup button is built in to allow new users to create a Twitter account.
The plugin comes in 2 forms, a demo version that allows 10 exports before being disabled. As Twitpic tends to be a single image at a time service, this should be more than enough to form an opinion about requiring the plugin or not. The full version works in exactly the same way, but is not restricted. The full version is available for download via e-junkie for a coffee busting €2.50 (introductory offer).
The Plugin traps Twitpic errors and displays the text in a dialog. The list is not exhaustive, but covers incorrect username and password, incorrect file type and file too large (over 5Mb).
Note: As with the FTP presets in Lightroom, this sends text, including the password, in the clear, so be warned if you are using someone else’s network, they can snoop out your password.
Known issues: Sometimes if the plugin is used immediately after starting, Twitpic will return an incorrect file type error. As the plugin automatically creates an sRGB Jpeg, it can’t create the wrong file type. I suspect the file sends before it finishes processing. Simply resend the file and it will work the second time.
Install and use. To install this plugin, open the Plugin Manager (File>Plugin Manager) and click Add on the bottom left. Navigate to the unzipped file and choose it. The Plugin is now installed. To use click the Export button in the Left Panel of Library. Alternatively use the shortcut Shift Command E on Mac or Shift Control E on PC. Click the top of the Dialog (default says File on Disk) and choose Lr2Twitpic from the list. Enter your Twitter Username and password, along with an optional message. Choose from the other options including file sizing (recommended!) and watermarking. Click Export when ready.
To view the custom metadata associated with this plugin, click the preset field beside the title of the Metadata panel and select Lr2Twitpic from the list.
Click Add to Cart to be taken to E-junkie where payment can be processed. By purchasing the user agrees to the EULA agreement.
Support can be obtained at http://lightroom-blog.com/forum