I think that would put too much weight on the EXT connector when one holds up the Pandora to use it, if they're that short. If they go that method, the dongle should be at least a half metre.
The ext port & connector is relatively sturdy:
http://urjaman.dyndns.info/12032013.jpg
That is an ext port connector + tinybob + piece of cable to an RCA CVBS connector + an EasyCAP USB capture device, and it all hangs off the pandora ext port without visible bending or a feeling of it being too heavy. Maybe 5cm was too short, but I'm thinking of about the length of the cables on the EasyCAP in the picture. IMHO it should be two 3.5mm minijack females ("LINE IN" & "LINE OUT"), one Mini-DIN 4 "S-Video" and one Mini-DIN 8 labeled "GPIO", so also same amount of cables (4) as in the EasyCAP pictured.
But yeah, maybe somebody should move this discussion in a more proper thread, so sorry if off-topic - but maybe it is enough in-topic and maybe ED will take some of this advice to GC if they are still designing the cables - but I think that we are a bit late.
What I'm really trying to say is that what I'd really want to boy would be cables/adapters that allow all of the uses of the EXT port at once, without being too expensive.
What I'm against is huge cable-set with integrated (expensive) electronics for the UARTs - people who want just a TV-Out cable will not want that.
I'm just worried that the only cable that will be worth it to manufacture will be an analog only 3m monster. I will have no reason to boy that (and I'm guessing I'm not totally alone), thus making the problem of too few boyers for a cable worse.