Turtles all the way down, #vBrownBag

vBrownBag

We are a video podcast that provides free training materials for people working in emterprise IT infrastructure. We help geeks to be better geeks.
We attract about a hundred thousand video downloads per year. The videos are produced by a much smaller group of volunteers.

I need two sticker designs with a common theme.
The first sticker will be givenaway to anyone at the conferences we attend, it should carry the brand image in the attached logo along with the text "#vBrownBag"
The second sticker is just for the hundred people who produce the training content, it should be based on the main sticker but differenciate that this person is a presenter of the videos.
Finally I'd like a better quality version of the attached logo, a vector version to use for embroidered polo shirts at the conferences.

The turtle is part of the brand identity as is the brown bag and the #vBrownBag hashtag.
professionalvmware.com should not be part of the design, it will be replaced by vBrownBag.com over this year.

We have used the attached image for round sticjers & badges the last two years. I am looking for something with an interesting outline. The new stickers will be die cut vinyl so can be any shape. I've added a photo of my laptop with some stickers that have complex outlines.

I am based in New Zealand, feedback will occur during New Zealand work hours.