So, Focus Enhancements has a new CF Flash recorder, the FS-H200, that works for some JVC cameras, but is not listed as compatible with the HD-100-200 series (they want you to buy their HD recorders for those). But someone over on DVinfo bought one and it works on his HD-110. I called JVC, they said it will work, but without camera viewfinder information. You can use the camera record buttons, but you have to look at the unit display for capacity, etc.
Anyone else bought one yet? It's much cheaper than the MR unit (although the CF cards bring up the cost quite a bit if you buy 3.