OK I caved and installed 2.5.2 on my K2i! Thanks, luvmy4brats!
I was at 2.3.3 so I had to use the 2.3.4 updater before it'd recognize the 2.5.2 updater. The 2.5.2 update paused at around 90% for me too, but only a minute or three.
I've also mirrored it on RapidShare to spread the love, so have at it:
Kindle 2 International 2.5.2 updater (Rapidshare)