Eco Eggs
• $30 (72 eggs)
• Eco Eggs
I felt really guilty buying plastic eggs a few years ago for my son's first Easter egg hunt and would have happily shelled out more for this new biodegradable version made from corn starch. Look for smaller quantities online ($10 for 25 here, for example).

Nomade Express Slee...
This is great, I recently was looking for cardboard ones. Really, I prefer hiding the real eggs, the ultimate compostable/ edible treat with a lot less sugar inside!
These are nice, but I have to say I've never bought new plastic eggs. Thrift stores typically have tons around Eastertime. We resuse them from year to year. But when they eventually break they do go to the landfill, so it's nice to know there is a biodegradable alternative.
I love easter egg hunts, but I don't think we can buy our way to Green. Most folks I know make their own eggs (out of scrap materials like wool or used paper) or real dyed eggs and yes, they eat them afterwards. I haven't seen those plastic ones for a decade and using corn starch just means the corn crop fields take up even more land, and we still have that wasteful cardboard box.
To follow up on Emmi's comments, with which I agree, while bio plastics use less emissions, most consumers are unaware that these products don't really biodegrade unless taken to a commercial facility for composting at the correct temperature. If they are thrown away as landfill, they'll most likely remain intact for years to come.
The Biodegradable Products Institute (BPI) is a good source of information: http://www.bpiworld.org/