I've updated the right sidebar with some links, I figure I should explain more on the Tasawwuf links. I don't link haphazardly. There are three scholars whose organizations I have close family members in or linked to at the moment, so I've gained a bit of information on them and their views. Two are specialists of Tasawwuf and I have linked to their sites:
Shaykh Hakeem Akhtar in Karachi, often said to be the most influential Sufi Shaykh alive in the world today, authorized in Qadiri, Suharwardi, Naqshbandi, and Chisti tariqas (Sufi orders). He delivers sessions daily from his Khanqah Imdadia Ashrafiya in Karachi. He is most well known for his popular commentary on the Mathnavi of Maulana Jalaluddin Rumi (ra), which was translated into English and distributed online by one of his students/khulafa (authorized representatives), Maulana Yunus Patel from South Africa.
The other is Shaykh Zulfiqar Ahmad (a Shaykh of the Naqshbandi tariqa), and specifically his khulafa in New York. The latter have a lot of English lectures and sermons available on their site being that most of them are from or live in the United States. There are quite a few MDs and PhDs of varying fields among them. Click here for the page with his audio lectures. Click here for the page with a list of his khulafa, their credentials, and their lectures. Of particular recommendation is Shaykh Mufti Kamaluddin Ahmed who has a lot of English lectures up. A noteworthy one is his lecture on "Controlling One's Desires".