Join open source design
Introduce yourself (right on!)
One of the challenges in getting open source projects and designers to find each other is that communication channels for each of the two seem to have very little overlap.
The best bet from the open source project perspective is probably Github. If you’re interested in whatever intersection of design and open source, (create your Github account and) come on over and say hi.
What would be a similar starting point from the design community perspective?