Links

Briar Press (largest online letterpess community)

AAPA Info

The Iron Curtain Press

The Nomadic Press

The Larkspur Press (beautiful broadsides)

Crane's Lettra

The Boxcar Press (photopolymer plate suppliers par excellance)

Five Roses Press (great introduction to letterpress printing)

Modus Press (typical modern letterpress ...meh)

Gamewell Press

Pressing Letters

Twinrocker (internationally known hand made paper makers)

Clipart ETC 
Cranky Pressman

Typography

Platen Levelling

Skyline Type Foundry (less expensive metal type)

Chicago Type Foundry Price List and Fonts

Elum Platemaking Service  (wedding invites with Target colour schemes...)
Invitations, Acceptances and Regrets (a la Emily Post)
MyFonts.com (helpful font database) 
Letterpress Type
Unison Letterpress 
Spark Fine Stationery (buy our merchandise here)
The Grid System 
Isle of Printing (Amazing Lino cuts)