So, someone pointed out in the comments that the Elisa packages for F10 are very old. I got in touch with the maintainer to see what's up.
It turns out he would dearly love to be updating them every week and have them bang up to date, but he's been waiting to have the new sub-packages that came in with 0.5 reviewed for nearly a year: see this bug report.
This is a shame. :( If anyone reading this has package review privileges, please review the packages - the Elisa ones, obviously, and also python-twill.
For now, anyone wanting up to date Elisa packages for Fedora 9 and 10 can grab them here. They're updated every time a new release comes out.