Thank you very much for the nice words and thorough feedback. Currently, we are working hard on front end improvements, and believe that most of the issues will be fixed in the second beta.
Concerning on 5th item "Validation Bug": I can say that this is not a Sitefinity
problem. You just have to set your IIS to allow the Sitefinity Optional URL option. Here are the steps to do this:
1. Open IIS
and go to the Sitefinity 3.0
2. Right click on it and select Properties
from the context menu;
3. On the Virtual Directory
tab click the Configuration
4. Add the next extension in Mappings
Uncheck Check that file exists
5. Save changes;
Now the Optional URL
option should work correctly.
Please, note that the instructions listed above are valid for Windows XP only.
I hope this information helps. If you come up with more questions, please do not hesitate to contact us.