Alan Knox has a post on the Theology of Encouragement in Hebrews, which will be his Ph.D. dissertation topic. He notes a number of passages in Hebrews with the theme of encouragement. It sounds like it will be an interesting dissertation.
Over at יהוה מלך is a posting on the mode of baptism. A number of passages are cited, including some from Hebrews, which suggest that sprinkling is a valid form of baptism which symbolizes purification, cleansing, and regeneration.
Update: Note Alan Knox's clarification in the comments section.