In searching for a website for Advent devotionals recently, I found a website called Following the Star. The devotionals are written by Brian Prior a priest at the Episcopal Church of the Resurrection in Spokane Valley, Washington. If you are looking for a daily devotional guide, I recommend visiting their site each day during Advent at www.followingthestar.org.
The site offers a daily time of silence and reflection, a Scripture reading, a short devotion, and a benediction. The site also features music created specifically for the site. If you visit the site, be sure to read "On Your First Visit" and "About The Experience" before you begin the devotional.
May the Lord draw you ever closer to Him during this blessed Season of Advent!