Nice to see this effort moving forward.
In October 2005, Dave Winer put out a community request for a beautiful OPML icon. While several options were presented none have gained traction. During our quest for an icon during an OPML related project we realized we needed to develop our own.
You are free to take this icon and spread it around the community, use it for your own projects, or create derivatives. The only thing we request is that you release your creation under the same license to the community.
Source: OPML Icon Project
More information from Chris Pirllo's blog:
OPML is great - and for feed organization, it’s equally awesome. Just about every news aggregator supports importing and exporting OPML, but there hasn’t yet emerged an OPML icon design that is equally as appealing as the “standard” feed icon set forth by Firefox and subsequently adopted by the industry. In working with information architects on TagJag, we decided to dedicate some cycles to designing an OPML icon for use on the site:
Source: OPML Icon ~ Chris Pirillo