We have GSM almost at every nook & cranny of Naija.
Text messages, emails, online voting.
Free or premium-priced sms will serve to encourage respondents.
Information/adverts placed on TV, radio, newspaper, bill-boards, flyers, posters, multimedia adverts, etc are but a few.
Some media houses did something similar during international beauty pageants, etc.
All it needs is the right publicity mix, the right media noise at d right places portraying the importance and benefits of same should pull a good level of participation by the populace.
Internet access is also there; at most multiple entries from a singular cell-phone or computer IP address culd serve as a check to disqualify such.
It can be done!
Just a thot!