Hello Claire,
I transcribe parish registers from Essex. They appear on
www.freereg.org.uk (there's several people transcribing Essex on there so have a look to see if anyone's working on the parishes you're interested in). There's over 800,000 Essex transcriptions on there:
http://www.freereg.org.uk/freereg_contents (contact Julie if you'd like to join forces with FreeREG).
I also put them on my own website, along with transcriptions by a couple of other FreeREG'ers:
www.essexandsuffolksurnames.co.ukI checked with ERO before putting them online, and they're happy for people to transcribe them. I get the impression that, as far as they're concerned, it makes their records more accessible, so the more transcriptions that are done, the more people will access their archives (to check their image against the transcription before committing to adding the event to your tree, to look for wills, manorial records, Poor Law records etc as your tree expands from using the parish registers). The images however mustn't go online. Someone from ERO wrote an article in the Essex Family History Society's newsletter which implied they were supportive of volunteer transcribers.
In terms of copyright, the image (so the scan of the parish register) belongs to ERO but the information on it - "John son of John & Sarah Jones was baptised 23 December 1752" isn't copyrighted. Hence transcriptions are fine - and in fact, the transcription becomes the copyright of the transcriber (because it's your work that's gone into transcribing it). This is the copyright interpretation which FreeREG operates under.
The Essex Family History Society have transcribed some parishes and you can buy CDs of them but there's not many, and only Colchester goes back before 1813 on their CDs:
http://www.esfh.org.uk/products/Essex-Parish-Registers-~-Buy-CDs.html. This is why I decided to transcribe them myself!
Hope that helps. It's lots of fun transcribing. You find all sorts of strange notes, and sometimes you might find someone unexpected from your family wandering into a parish you hadn't known they were connected with. It's really eye-opening. (if not rather eye-straining sometimes!).
Best wishes,
Helen.