Here are my votes:
1A. Italy - Out of the Box
2. China Communist - I personally wont use a communist Chinese roundel.
3. Canada - OOB - The Canadian roundel you showed is not the OOB roundel. This is the OOB roundel.

4. Poland - Dont personally care for your version. The official roundel from WWII was actually a square. Here is an adaptation of the official WWII roundel adapted to a circle. (Ignore the green.)

5. Dutch = OOB - Works for me.

6B Finland - (Technically 6A is correct but I would avoid swastikas where possible.) 
7a. Hungary - Works for me.

8a. Bulgaria - Works for me

9b. Romania - Works for me

10b. India - Union Jack - **(Most bang for your buck, even though its not India per say) **http://www.mediafire.com/imgbnc.php/97003ec7720a7c219f28d82e1e7570e92g.jpg
Just my opinions. Take them or leave them. Good luck with the project.