Reddit mentions of Let's Study Urdu: An Introductory Course (Yale Language) (v. 1)

I know nothing about Greek, but for Urdu I have Teach Yourself Urdu by David Matthews and Mohamed Kasim Dalvi. I think it's a pretty good book. However, I would not try to learn the script from it. Get Teach Yourself Read and Write Urdu Script for that. A friend of mine also had good things to say about Let's Study Urdu by Ali Asani. She also really liked Urdu: An Essential Grammar. I haven't used that, but I have use the Essential Grammar book for Hindi and thought it was pretty well-written. There is also Darvazah: A Door into Urdu, but unfortunately certain parts of the site don't seem to work.

If you're into it, you could also learn Devanagari (Hindi script) and then you'd have access to Hindi learning materials as well (Hindi and Urdu are VERY similar- most deviation is in vocab and grammar is mostly the same). I could give you some recommendations for Hindi too if you're interested.

If you're willing to make a worthwhile investment, I recommend this:
http://www.amazon.com/Lets-Study-Urdu-Introductory-Language/dp/0300114001

Great resource.

I dont know of any really good online resources for learning Urdu, but i can recommend some books.

This is a good script book. It what we used when I audited Urdu at my University during Grad school. I am an anglo american and had very limited previous exposure to Urdu, especially reading and writing, prior to taking that class and using this book. Now i feel fairly confident in my urdu reading and writing, even though my vocabulary and speaking is still very limited.

http://www.amazon.com/Lets-Study-Urdu-Introduction-Language/dp/0300120605

Here is the corresponding text book which is pretty good. It doesnt do a great job to teach vocabulary, mostly grammatical things. But as a somewhat native speaker (it sounds like) that shouldnt be too much of a problem for you.

http://www.amazon.com/Lets-Study-Urdu-Introductory-Language/dp/0300114001/ref=pd_bxgy_b_img_y

This is considered by many to be the best program available in the US: http://sasli.wisc.edu/
In addition, I would recommend the following - I have taught from them:
http://www.amazon.com/Lets-Study-Urdu-Introductory-Language/dp/0300114001/ref=sr_1_2?ie=UTF8&qid=1331705848&sr=8-2
Hope that helps.