שיחת מפתח:Seligman Baer - Seder Avodat Yisroel (1901 ed.).pdf
Transcription of Seder Avodat Yisroel began at the Open Siddur Project's transcription wiki (now defunct). The archive of our transcriptions is located here. We are slowly merging the liturgical material from our earlier transcription work into Wikisource. (We hadn't yet begun to transcribe Isaac Seligman Baer's commentary).
Gabriel Wasserman's transcription of Seder Avodat Yisroel, included in his Machzor for Chanukah, is also available to be proofread and merged into this transcription. His transcription is available here. Please note that Gabriel's transcription lacks meteg diacritics, which need to be added in this transcription.
The Siddur Bnai Ashkenaz compiled by R' Rallis Wiesenthal (and shared CC-BY-SA) is also available for use as source text. It is available as Unicode text here.