Volumes 1 - 11 and 19 of the Phillimore transcriptions of Nottinghamshire marriage registers are available on-line.
www.archive.org/search.php?query=phillimore%20nottinghamshireseems to give the full list. (19 is the one without a volume number in the title)
Each is given in a number of formats. The OCR processing is not always reliable, and the "full text" version has some odd formatting. I've generally used "read on-line".
I'm afraid I do not know if the remaining volumes will appear in future - the search string above should though pick them up.
