I'm happy to say I've finally found a reader that I like for the iphone.
On a 3G at least it's quite a bit faster than any of the other options that I've tried. Great job, Micah (and co.).
If I had one request it would be to be able to sort by series and see the series number in the Library. I often bring a whole series over to my reader at once and often forget which book is 'next'.