Not that I do all that much writing in Chinese, but I just downloaded and installed the new Google Pinyin IME and it's pretty frickin' slick. Check it out. Thanks 小胡子 for the tip. One of the things I like about it is that it's pretty good at picking out when you want to type an English word in the middle of a Chinese string. Like this: 谷歌新出的汉语拼音输入方式真他妈牛. 可惜 Google 的中文名字那么fucking傻. That's just an example, of course, and not necessarily my opinion, or the opinion of my employer.
Update: Okay, so now Google seems to be admitting that they lifted the vocabulary list from Sogou, though they only go so far as to say it was from "non-Google sources." Good catch, Yee and all the other Chinese bloggers who noticed. According to the Netease story cited above, Sogou (Sohu's search engine) is demanding a public apology and that Google stop offering the download. Here's an English-language report from Xinhua on the kerfuffle. Stay tuned.