Thanks for the great replies!
FWIW, We're visiting these locations as a part of a 13 day trip:
Istanbul, Gallipoli, Canakkale, Troy, Izmir, Ephesus, St. Mary's House, Pamukkale, Hierapolis, Antalya, Perge & Aspendos, Konya, Cappadocia, Urgup & Goreme, Ankara, Gordion, Bursa, and finishing again in Istanbul.
Whew!
For reference, the turkish embassy website lists this page where they identify what items will go through customs. It's on this page where these comments about electronics appear:
Electronic Equipment:
One black-and-white television; one colour TV (up to 55cm screen); one pocket colour TV up to 16cm screen; one black-and-white television-radio-tape (combination); one video recording camera and 5 video tape cassettes (blank); camera with eight mm (with ten blank films); one slide machine; pocket PC (Up to 128MB Ram); compact disc player; one portable radio and radio-tape (the properties of the radio-tape will be determined by the undersecretary.); one walkman or small tape-recorder; Game Boys without cassettes and cartridge; record, cassette or compact disc maximum of 5 for each; GSM-Pocket phone (With SIM cards) will be permitted to pass through Customs.
Other Items:
One portable typewriter; one camera (plus maximum 5 films); one pram for each child passenger; one bicycle for each child passenger; toys for child passengers (maximum 10); pocket calculator with battery; one iron (with or without steam diffusion); 1 x 1.5 metre seccade (prayer rug) made from wool, cotton or synthetic fabric); one pair binoculars (except night binoculars); one table clock; one gas stove will also be permitted to pass through Customs.
Türkiye Cumhuriyeti Va?ington Büyükelçiliği
(I like the comment about up to 128 MB ram in a pocket pc.
)