At least one country has now offered asylum:

Uganda would welcome Muammar Gaddafi if he requested asylum, Al Arabiya reported Wednesday after Western and other states suggested the Libyan leader should go into exile to end the conflict in his country.
The television channel did not give further details.
Uganda is a member of the African Union ad hoc committee trying to mediate a resolution of the Libyan conflict after the United Nations authorized air strikes to protect Libyan civilians from forces loyal to Gaddafi.
The United States, Britain and Qatar, which joined others at a meeting on Libya in London Tuesday, suggested Gaddafi and his family could be allowed to go into exile if they took up the offer quickly to end six weeks of bloodshed.
Gaddafi has been a driving force behind the African Union, his largesse has extended Libya’s economic reach throughout sub-Saharan Africa and he still has some close friends in power.

Full story at Reuters.