In June of 2014, Ancestry.com announced they were removing Mundia.com from the Internet. They are encouraging those with family trees on the program to copy any data they wish to preserve. The program is supposed to be removed on 5 September 2014.
It appears that the two databases (if there are two) are linked together. Since Mundia.com is apparently still in its Beta testing period, it is still free. The last blog post to the Mundia Blog was on 17 May 2011. It has all the appearances of a program that is in the throes of being abandoned.
It is interesting that there are these bits and pieces floating around on the Web. I couldn't find any significant mention of the program since sometime last year.