TURKEY
Turkish History Timeline - It's been inhabited since 23,000 BC
Practical Information:    
Turkish airlines offers really comfortable, affordable and reliable service  
All about Turkey - Burak Sansal is Turkey's version of Greece's Matt Barrett. Although we've never used Burak, we love his website  
Argus Car Rental offers good cars at good prices at many locations throughout Turkey  
ISTANBUL
Apartment rentals and Hotels:
Ansen Suites - $$ - contemporary rooms with kitchens near the Istiklal (a great area across the Bosphorus from the choas of tourism
Sumahan Hotel - $$-$$$ - a beautiful hotel on the Bosphorus. It's a little far from the central city but they offer a free boat service
Bentley Hotel - $$ - contemporary hotel near Taksim Square and all the trendy shops of European Istanbul
Four Seasons - $$$-$$$$ - What once was the old prison is now the Four Seasons. It's location is perfect if you like being in the thick of it.
Ciragan Palace - $$$$ - Live like a Sultan in this converted Royal Palace. The building alone is worth the stay. The service is amazing.
Museums and Destinations:    

 

 
Restaurants and Food:
 
Agean Coast (Assos, Ephesus, Bodrum)
Apartment rentals and Hotels:    
The Muses - $-$$ is a glorious British Colonial retreat in the midst of a small Turkish farming village. I truly wonderful discovery
The Butterfly - $-$$ is a very small boutique hotel in Bodrum
The Marmara Bodrum $$-$$$ sits above Bodrum with beautiful views of the harbor and the castle
     
Cappadocia
Apartment rentals and Hotels:    
Yunak Evleri Cave Hotel Luxurious Caves in the beautiful town of Urgup. The most fun you can have in a cave. $$$
Museum Cave Hotel Luxurious cave hotel in Uchisar; a beautiful hill town next to the Pigeon Valley  
Guided Tours:    
Argeus Tours make sure you ask for Ülkü Yilmaz (also known as Alec)  
Restaurants and Food:
Mezes (starters ranging from stuffed grape leaf domades to stuffed pastries), Hummus, tomatoe salads, lamb kebabs, pasta, break baked fresh in a wood oven, meat stuffed pasta (like ravioli) called manti, grilled eggplant, tomato stew with lamb or chicken and kebabs (meat or fish on a stick). My personal favorite is testi kebab (lamb, tomatoes, onions and carrots slow cooked in a clay oven for 5 hrs).
Sömine Restaurant in Ürgüp. I highly recommend the Testi Kebabi