So far, it seems that Canonical's $32 million Ubuntu Edge smartphone Indiegogo campaign has been a roaring success, having raised over $3.5 million in about 40 hours. But after selling out all 5,000 units in the lowest $600 pricing tier, Canonical has added three new pledge levels. Initially, those who missed out on the one-day-only offer would've needed to cough up $830, but there are now $625, $675 and $725 rungs prior to that price, each with 1,250 of the linux-coated handsets available. Meanwhile, the counter at the original $830 second level -- which had already been in the hundreds -- has been reset, with all those buyers dropped to the new $625 tier. Canonical promised it would "refund the difference (to those buyers) at the end of the campaign," adding it would contact each with more info. After setting an Indiegogo record by raising $2 million in about 8 hours, the fundraising inevitably slowed down, and the revised price tiers could be a response to that -- either way, there's still a steep climb to the gargantuan target.