Easels, Pochad Boxes and other Plein Air resources

It's that time of year.

I've been Plein Air Landscape painting a bit lately and doing some research on different easel options. Here are some of the useful items I found.

Pochade Boxes & French Easels:
Ben Hagget's Pochad Boxes 
Soltek Easil This is a high tech version of the french easil. Often referred to it as "the Cadilac of French Easels". It's heavy but has a very stable base and is remarkably easy to set up on-site. It's great for tall painters but has a large footprint.

Plein Air Groups:
Mid Atlantic Plain Air Painters Association
Plein Air Painters of America