Back in the mid 90's around the .com bloom, there was a company called WebOS.com (I hope remember correctly since www.webos.com is pointing to www.hyperoffice.com now). Based on IE and ActiveX control technology, they recreated a web based desktop environment and bundle with a set of office suite (word processor, spreadsheet, presentation, email, and instant messenger).
Now, we are talking about Microsoft Live Office, Google Office, ThinkFree Office, etc. Everyone is trying to do the same thing again: putting business applications online and charge customers with micro-payment. Does it gonna be work again?