The site vozMe - From text to speech allows online conversion of any text to MP3 format and the resultant file can also be downloaded.
All it requires is that the text be pasted to its relevant box and it would convert into male/female voice MP3 format.
It supports English, Hindi, Spanish, Italian & Portuguese.
I personally did not like the accent.
But could be an useful tool for some.
It also has iGoogle Gadget & Facebook widget