Details (thanks to despotliz for pointing me to the full stats):
Spin had a convincing lead over Accelerando at all stages of the count. Accelerando came second, with a smaller but still convincing lead over Old Man's War. The third place result was very tight, Old Man's War one first preference ahead of Learning the World, extending that lead to two on the second count, and ending with 216 to 213. For fourth place, contrary to Ken MacLeod's gloomy predictions to me a few weeks earlier, Learning the World was decently far ahead of A Feast for Crows which in turn was decently ahead of "No Award" for the fifth slot. Apparently Neil Gaiman withdrew Anansi Boys which otherwise would have had the third highest number of nominations and would have knocked Old Man's War off the list.
"Inside Job" was in fact level with "Magic for Beginners" with 124 first preferences, inched ahead for the second, third and fourth counts, and then received a substantial number of transfers from "Identity Theft" to finish ahead by a clear margin. "Magic for Beginners" was a reasonably strong second place, with a tight contest between Burn and "The Little Goddess" for third resolved in Burn's favour, again by transfers from "Identity Theft". "The Little Goddess" came a comfortable fourth, and "Identity Theft" a decent enough fifth with fewer votes preferring "No Award" than for any of the other fiction categories.
The results for Best Novelette were pretty clear with nobody changing places at any stage of the count: "Two Hearts" top, "I, Robot" in second place, "The King of Where-I Go" in third place, "The Calorie Man" in fourth and "Telepresence" in fifth.
The Best Short Story category saw the best performace for "No Award" indicating general voter dissatisfaction with the choices available. "Singing My Sister Down" actually got the highest number of first preferences, 120 to 110 for "Tk'tk'tk" but did dismally in later stages, with "Tk'tk'tk" getting more than twice as many transfers from "The Clockwork Atom Bomb" and doing almost as well from "Down Memory Lane". For second place it was even more drastic, with "Singing My Sister Down" again starting on top, but being overtaken by both "Down Memory Lane" and "The Clockwork Atom Bomb", the latter winning the #2 spot. Even for third place, it was fairly tight, "Singing My Sister Down" finishing on 217 votes to 202 for "Down Memory Lane", which secured fourth place fairly comfortably. "Seventy-Five Years" did not shift from the fifth place at any stage, and beat "No Award" by only 257 to 96. ("No Award" also got 64 votes to 340 for "Tk'tk'tk" in the runoff to see if the award could be made at all.)
Looking around elsewhere, I see that the three Doctor Who stories won the top three spots for Best Dramatic Presentation (short) - Hurrah! Though "Father's Day" sneaked it by a single vote ahead of Battlestar Galactica. (Followed, a very long way behind, by "Jack-Jack Attack", Lucas Back in Anger, and last year's Hugo awards ceremony.)
The most one-sided result was, predictably, the one in which the most votes were cast, Serenity getting 329 out of 660, and winning a clear majority once "No Award" had been eliminated. This category also saw the only actual tie, for third place, between "The Curse of the Were-Rabbit" and "The Lion, the Witch and the Wardrobe" ("Batman Begins" coming second and "Goblet of Fire" fifth).
The closest result for any actual award was for Best Fan Writer, Dave Langford finishing with 156 votes to Cheryl Morgan's 148 (Cheryl presumably being boosted a little by the fact the the Worldcon was on her home turf).