I've made some fixes to the sitemap plugin and included the user interface style for the WP 2.7 version.
Feel free to try it and if you have experienced any problems in the previous versions, please check if they are solved now. If not, please post in this thread and let me know. To fix some bugs, I might need to have a look at your specific WordPress installation, so if you would like to help getting rid of them, please write me an email after posting here so we can exchange the server access details.
Thanks for your assistance!
Here is the download URL:
PLEASE BE AWARE THAT THIS IS THE TRUNK (DEVELOPMENT) BUILD WHICH MAY BE UPDATED WITH SMALL FIXES WHICH MIGHT INTRODUCE OTHER PROBLEMS
With other words, test it on a test site first ;-)