Anyone who has an iPhone or iPod Touch, I'm using a great Chinese-English English-Chinese dictionary called iCED, it has great search features unlike any other and features the ABC dictionaries: iCED for iPhone and iPod touch presents a unique way to use a Chinese dictionary. After you've found the entry you were searching for, iCED will continue to search for compound or component entries to complement your search. Component entry dissection allows you to quickly understand the meaning of components in longer words or phrases. For example, if you look up 中华人民共和国, iCED will also look up 中华 and 人民共和国. You can then select the latter to break it up into 人民 and 共和国. When you get to single characters, iCED will look up compound entries starting with that character.

Search for "iCED Chinese Dictionary" in the iTunes store, there is a free version of iCED but the included dictionary does not come close to what iCED with the professional ABC Chinese-English dictionary provides...