I love these little easter cupcakes, I am new at the cake business, I have recently descovered i do actually have a passion for something, i have always loved cooking but this is just nuts.

What tip would have been used for these cute Easter Nest Cupcakes

It looks to me like they used the Wilton #233 tip that is usually used for grass and fur.

I just googled and found the website with the pic on it and the person that made them said in the comments that they did in fact use tip #233.

Grass tip for sure

Great thank you, i just ordered one, hoping it would be here before easter but Nope oh well, wonder if i can pull it off with something else.

Thank you!

I did a chocolate cake that had a similar look to it. I melted chocolate into a long bar and then pulled it over the single opening on my grater. I was wanting to get big curls but they came out skinny and long. I tried like crazy to make them look curled on the cake but they were just too stringy...I'll attach the photo link. It sort of looks like what you're looking for! HTH!

http://cakecentral.com/gallery/1865816

As carmijok suggests, you can get this look with grated chocolate or even with a vegetable peeler.
The piece/bar of chocolate needs to be warmed for this. A couple seconds in the microwave will do.
If you do get nice curls from grating/peeling the chocolate put it in the microwave for a couple more seconds. It usually is too warm chocolate that will come out stringy instead of curly.

I'm hoping to achieve a similar effect with melted chocolate today or tomorrow. I'm planning on tempering my choc and then whizzing it in messy lines on a frozen granite slab and then curling the whole thing into a circle before it sets too hard... will let you know how it turns out...

Is it possible to achieve the same look (or similar) by putting fondant through an extruder and get those thin strings, then swirl them to look like a nest?