I recently created my first word list. First, I'd like to say that I am very impressed with the interface. It certainly feels like a lot of effort has gone into making the process very smooth. However, I do have two suggestions that might make it even better.
First, it would be great if the search results could take into consideration the frequency of use. Frequently I would type the pinyin for a syllable and there would be several less frequent characters displayed first. Sometimes the character I wanted wasn't even visible and I had to also search by typing in the English.
Second, when creating new words, it should be possible to enter the pinyin when adding the word to the list. The existing words are shown in the format "character (pinyin)". For example, "花 (hua1)". If I enter a new word in that format, then the system should parse out the pinyin.
Keep up the good work!