[Vobject] vCard and iCalendar examples with UTF-8?

[Aidas]

Dear vObject users and developers!

Could you please, write an example of code how to create vCard and  
iCalendar objects with text in UTF-8?

When I simply assign UTF-8-based street addresses or other info to  
the properties of vCard, I usually get errors like these:
'ascii' codec can't decode byte 0xc3 in position 11: ordinal not in  
range(128)

Regards,
Aidas Bendoraitis aka Archatas