Ken Rossi, of Liquid Orb Media, emailed me asking me to mention their project/site hoping to standardize the opml icon. There's been a some discussion of a standard icon,
including Dave's post and Chris Pirillo's proposal.
Like Chris, we're also supporting the liquid orb design, but the discussion is open.
Update: Apparently Dave was canvassing for an icon for validated OPML. Dave left a link to a clarification post in the comments. Sorry Dave! There was no intent to mislead, I guess I misunderstood the context. Dave's choice for default icon is the orange and white XML chiclet/badge.