1) I have a category limited to a restricted set of registered users (with Role Scoper). This category and posts in it should not appear in sitemaps. "Google XML Sitemaps" plugin observes the restriction so it can be done.
2) Problems with saving plugin settings. Clearing a field of a value (and saving of course) does not clear the saved option. Reloading the settings reveals the previous values.
3) Problems with titles. As several other topics describe there are issues with the title handling. Personally I would be willing to let the plugin handle them by leaving the title tag as recommended. However I want to choose the divider since the default (-) is ... well ... boring.
Other issues may surface but these are enough for me for not using this beta level in production and suppress further testing. However keep up the good work!