I don't think you can do a kickstarter for something that already exists.
Also, you have to take into account that kickstarter takes 5% for itself, 3% to 5% for payment fees, and you have to pay VAT on those fees as well, so all in all about 12% of the collected money disappears.
Since ED seems to have enough liquidity to keep Pandoras in stock, I don't see what the benefit of a kickstarter would be except maybe for publicity - although you still have to do most of that yourself, and it may actually be harder because many tech sites are a bit tired of kickstarter projects.
The main thing that holds people back from buying a Pandora is the price. It is currently 539 EUR, so if you would want to get the same amount of money when selling them on kickstarter, you would have to ask 612 EUR so that after deduction of fees, the original amount remains.
I think it's a better idea to try to lower the price. If the first digit could become a "4" for the 1GHz model and a "3" for the Rebirth model at some point, that would help.
For the hypothetical future Pandora 2, a kickstarter could be an option, but I don't think it would necessarily be the best idea - why pay those fees and have a potential new preorder mess? I think it would be better if Pandora 1 sales can eventually produce some profits to get the Pandora 2 production started (possibly aided by some community donations and/or loans), and start selling them from stock instead of taking an uncertain number of preorders. Once ED's pre-order queue is gone, he can start to pay back the investors (or convince them to turn their P1 investment into a P2 investment), and then hopefully make enough of a profit to start a P2 project.
There is no rush; if anything, the crazy pace of smartphone innovation will only make it easier in the future to get great components at cheap prices, so maybe it's better to wait a bit until the cutting edge of today becomes cheap enough to make a really great P2 in 2015 that can be sold for ~400 EUR, instead of trying to rush to make the same thing in 2013, have all sorts of delays, get lots of angry pre-orderers again, and end up delivering it in 2016 for ~800 EUR.