Microsoft has already sent BING to the iPhone and now it looks as if Office Mobile may be following suit. A recent Microsoft job posting for a Business Division Software Engineer reads, in part, "In addition to the current Windows Mobile 6.5 and upcoming WM7 clients, with the recently announced alliance between Microsoft and Nokia we are working to bring Office Mobile to hundreds of millions of Nokia smartphone owners, followed by other leading Smartphone platforms."
One can only assume that the "other leading smartphone platforms" would include the iPhone 4 or possibly Android phones. While expansion isn't necessarily a bad thing, one has to wonder if Microsoft should keep their focus in-house and get Windows Phone 7 finely tuned before branching outwards. Then again, Microsoft is a huge company and having more than one pot on the stove shouldn't be an issue.