Aviary strikes me as very similar to Google Sketchup, both offer tantalizing functionality for free, but if you are used to a beefier tool like Illustrator or S

Aviary strikes me as very similar to Google Sketchup, both offer tantalizing functionality for free, but if you are used to a beefier tool like Illustrator or Solidworks the capabilities are frustratingly limited. I hope they do well, the web based platform and creative community they have developed are great assets.