Thanks Barbara for kicking off this wonderful tutorial – I’m looking forward to seeing the results 🙂 In case anyone wants any further ideas for designs/layouts, or just wants to drool over some eye candy, here are a couple of links for you to galleries:
AccroStitch – scroll down the left-hand side to “La galerie des enveloppes brodées et ses rondes” … there are pages and pages of finished mail art envelopes to drool over 🙂
Veronique Million – picturetrail album
Liliankok – webshots album
Aniza’s album – an alternative method of making the mail art envelopes
I thought I had a few others bookmarked, but can’t find them … but that should keep you busy for a while. If anyone else has some links to share, please leave a comment with the link, and I’ll add them to the list 😀
Here are some more from a mail art exchange I was part of last year – there were only three of us in the exchange, but the mail art was beautiful 🙂
To Zohrah from Anne
To Aniza from Zohrah
To Anne from Aniza
Focus on Finishing 
Hello, Anne!
I’d be happy to share my photo album of steps in making mailart with linings that serves as a binding too.
http://picasaweb.google.com/ummiAR94/DecMA