i only added the grey background for display purposes - you can use the logo with any background color you prefer.. but if you want to permanently use this background as part of the logo, i can include it in the final eps-file. that way it will be adjustable to any size.
yes =) 29 is a plain version, while 30 and 31 include a gradient in the icon. i personally favor the simple version, as it is timeless and easily transferable to all media.