I wouldn't count on just listening at class for remembering techniques. I've seen plenty of ppl (well, more like 5) who got to their first test without knowing any technique name. I wish I could give you some of the links I used to learn technique names, but that was more than a year ago...
If you can spare the money, Aikido3D (
http://www.aikido3d.com/) is a good learning tool for techniques and their names!