On Tuesday, 3 November 2015 18:05:40 UTC+2, Dan Marotta wrote:
The Dynon D2 looks like a fine piece of equipment but it does not
have the TSO to be used in IFR flying.*

Glider cloud flying is not considered real IFR flying in Europe (for example), and gliders or equipment do not have to be TSO/IFR, only cloud flying equipment is required (compass, turn&bank, 10 m/s vario, clock). Difference between cloud flying glider and real IFR flight is that with latter you are supposed to know where you are and where you are going. Glider cloud flying regulations kind of suppose that you are flying well above ground (which is always VMC) and stay locally inside one cloud at a time. I would have no problem using non-TSO'd equipment, don't you have thousands of experimental planes flying IFR every day using these?