Animal Planet's page on the birth and rearing of Kintana the Aye-Aye at Bristol Zoo, has a number of interesting links to further resources on the endangered Aye Aye.
First up is the Madagascar Fauna Group at www.savethelemur.org.
Second is the Madagascar Wildlife Conservation, which features a rather splendid historical map of Madagascar.
This led me through to the Lemurs Of Madagascar site, which is full of lemur information. You can find out more about the Aye-Aye from their species drop-down navigation by switching to the Daubentonia Madagascariensis option.
Their old plates gallery has some beautiful pictures of lemurs, including this pair of extraordinary Aye-Aye interpretations - Aye-Aye #1 and Aye-Aye #2.