I'm looking to cook some cut up lamb shoulder. Want a more Mediterranean/herb forward preparation instead of a curry. Recipe ideas?

I would brown it....

Guys these all sound so delicious. Thanks for all the ideas! The only other thing I'm wondering now is how I should cook it exactly. I've read some recipes saying you should brown it in cast iron then deglaze with white wine. Some say just put the lamb in a baking dish covered and cook away. Thoughts?

Lots of good feedback here. Your marinade is near perfect, but suggest you add dijon, lemon juice and/or red wine vinegar or red wine; you want some punch in that vinaigrette. I would also suggest marjoram over rosemary, mostly because i think rosemary is so overused on lamb!
HEY! What a second, Matt: read this:
http://www.sfgate.com/recipes/article/The-kindest-cut-Lamb-shoulder-is-succulent-3246050.php

I was actually thinking leg of lamb when i wrote my advice, but Shoulder has its own needed treatment. The SF Gate article is succinct and terrific.

Or lamb roast with haggis seasonings, served with potatoes, turnips, scotch. Only a month late or 11 months early for Burns Day.

Lamb with onions by Rowley Leigh in Financial Times.

Google Food and Wine fez lamb....did it last week , divine! The carrots with honey and ginger
Ginger was terrific with it.....

I would throw a little bit of Dijon mustard in the mix and maybe mint. I definitely think you're on the right track here! I would lemon zest instead of juice, since juice can be a very noticeable flavor and the zest will give you a nice touch of citrus.

Also, if it's already cut/cubed, why not skewer them on rosemary sprigs instead of just adding the chopped herb...the flavor will be a bit more subtle but it makes a lovely presentation.

In Croatia (where my family is from) we serve a dish called Lamb Peka. The Peka is traditionally covered and cooked in coal (very traditional and rustic), but of course you can cook this in the oven. You can add a mixed herb bundle (rosemary, thyme, bay) if you prefer more herbs? This is simple but really delicious!
Check out this recipe - http://www.sbs.com.au/food/recipes/lamb-peka

Many things. Usually during the summer, so there's more choice of veg's - but roasted potatoes are always good (you can squeeze some lemon over them, along with olive oil, garlic, etc.) Maybe some warm flatbread, a salad with black olives, feta, red onion, cuke and tomato is classic. Ratatouille is also perfect with lamb this way...

Your marinade sounds perfect. Pretty much what I use all summer for lamb on the grill. And yes - add lemon!

moroccan style. Dates, ras al hanout etc.
Couscous.
Yum.