The major currencies across the world have definite symbols.
But the Indian currency is written with the prefix Rs. So why not a symbol for our currency?

The Finance Ministry of Govt. on India has announced a contest for designing the symbol for Indian Rupee.
Open to only Indian nationals.
Last date to submit the design – April 15, 2009.

Five entries shall be shortlisted for final selection. The shortlisted Designers would be required to make a presentation to the Jury and would be awarded a prize of Rs.25,000/- each.
The designer of the finally selected design will get a prize of Rs.250, 000/-
Spread the word across. Hey, you too could submit a design!

All the details of the contest is here