Since October 2011 there is also a possibility to use ABBYY Gothic/historic Font OCR Technologies online - powered by ABBYY FineReader Online!
And that's how it works:
If your document contains text in black-letter typeface, choose the “black-letter typeface” option.
Note: at the moment, not all Fraktur OCR functionalities are yet available online. However, we will be happy to provide you with a trial and keep you informed on the updates! (Stand: 21.10.2011)
More information about ABBYY FineReader Online: