All of my work is done in Illustrator CS5. Vector files uploaded to Sta.sh will be in the Illustrator CS5 format. The reason for this is that I use Illustrator at work, and it is the program I am most familiar and productive with. I do plan to try make accommodations for Inkscape users in the future.
You may use any work found in my gallery for personal projects. If you do use my vectors you are not required to notify me, but I would love to see it just because I love seeing the things the community creates. :)