If you are promoting your own Zazzle products on Squidoo then you will still get your royalty as normal when using their Zazzle module. If you are promoting other people's products you'll need to use a text module and copy/paste the relevant html.
Not 100% true. If you promote your own products using the Squidoo Zazzle module you get your royalty almost as normal. You will not get the Volume Bonus.
I have just started to add my designs onto clocks :-) and will show off a few for your consideration and I will return and add to the list as I get the other clocks ready.
Right now I got:
Ladybug stuff: http://www.zazzle.com/ladybugs_wall_clock-256835058442736368
Zazzle cute for kids -
Music gifts for him: http://www.zazzle.com/music_guitars_wall_clock-256629855478466462