I just spotted a press release on the CharterOak website. Looks like they have a new microphone preamplifier, the MPA-1 being shown at Musikmesse 2011 . There is only a locked pdf file so I couldn't grab any info on it but it looks pretty nice:
http://www.charteroakacoustics.com/pressDocs/COAD_NEW_PRODUCT_Release_MPA1.pdf

If you get there, please check it out and let us know what you think.