Is President Yar'adua interested in a second term? And assuming he is, should he continue, or should he hand over to someone else?

Personally I think he is doing fine, at least. But what will ever dog his tenure is the legitimacy of the elections that saw him come to power. Thus, it would be best for him not to run again, and allow a fresh person, irrespective of the party or zone he/she is coming from, provided he/she won the elections, to handle the reins of this country. That is the only way he can redeem his impeccable image.