Instead of asking what do we "want", maybe a more useful poll might be "what can you build us?"
Wel that is easy too, you can grab a off the shelf cubesat... and put a pe1ruh space proven linear transponder in it.
Amen. Also there are TWO flight ready PSK-31 uplink with FM downlink transponders also ready to fly built By Mirek at Brno University. Ideal for a Cubesat.
They allow up to 20 or more simultaneous PSK-31 users on a 28 MHz uplink to all appear full duplex in the 435 MHz FM downlink that anyone can receive on any FH HT. Run PSK31 software and see all the conversations and transmit all 8 minutes of the pass and join the fun talking to everyone at once..
All the advantages of linear transponders (20 simultaneous users) and all the advantages of FM (simple 5 Khz Doppler tuning using any old FM radio). And it fits on a 3" square card. See details: http://aprs.org/psk31uplink2.html
All we need is someone to fly it.
Bob, WB4APR