I found nadānamkārī used in the plural in a video by Iranian political commentator Mohsen Sazegara that was posted to YouTube today (17 February 2010). He uses the word at about 2:40:

Here, for reference, is the (rather long) sentence in which nadānamkārī appears:

به هر صورت ندانمکاری‌ها و اشتباهات پی در پی دولت احمدی‌نژاد و سوء مدیریت آنها به اضافه بحران سیاسی‌ای که جنبش سبز در کشور ادامه داده و مبارزه مردم ایران که کماکان قهرمانانه ادامه دارد اقتصاد کشور را به جایی برده که به قول شهردار تهران، که گفته بود که در واقع، یک سال است که هیچ کس آجری روی آجر نگذاشته و همه کارهای کشور خوابیده است

Illustration of sāndīses found at www.razavi-canning.com

The reason this word was in the news this past week as that such fruit drinks were distributed at pro-government events. Green Movement adherents disparagingly referred to those who turned out at rallies in support of the government as ساندیسخوران (sāndīskhūrān) or “fruit juice drinkers,” the implication being that the government had bought their support for the price of a few fruit drinks.

I haven’t yet learned the etymology of sāndīs, though I suspect it may be a trade name that has become generic. The sāndīses shown in the illustration above are marketed under the label taqdīs (blessing).