Some Attempts to Answer the Question, "What is Sufism?"
Sufis, and Sufi Orders: Sufism's Many Paths
Sufism / IslamicMysticism
Serving the Guest:A Sufi Cookbook & Art Gallery
A Few Sufi Orders or Tariqahs
(There are many with centers in the U.S. For a fuller list see item 1 above)
The Ashki Jerrahi Order
The Sufi Order International
The Nimatullahi Sufi Order
The Qadiri-Rifa'i Order
The Naqshbandi Organization
Mowlana Jalaloddin Rumi
Some links to online resources for the study of Rumi's poetry
Sufi Publications, Publishing Houses, Book Reviews, etc.