Just a heads up that we recently added a new tool to the TSM website: The Official TSM Group Maker!
If you want to go straight to it, go here: http://tradeskillmaster.com/site/group-maker
Here's how you use it:
1) Copy some item links either from one of many places including the forums, Wowhead, TUJ, and WoWuction!
From the forums:
2) Paste what you copied into the TSM Group Maker input box and click on the "Make TSM Groups" button.
3) If all goes well, a popup window will be shown with your input string highlighted in an input box. Copy that text.
4) Go to the "Import / Export" tab of a group in-game and paste the import text into the import box and hit enter.
5) That's all there is to it! Wasn't that simple?
CREDITS: This is based on previous work by Insomniac and Nemona. The images above were created by Insomniac.