From the Microsoft Bing blog:
What you're seeing today is only the beginning. Lasso moves Bing beyond the search box. Although it will only be available in Bing for iPad to begin with, we're already thinking about how to take Lasso even further — so stay tuned.
Lasso is a novel idea — the sort that fits the “new Microsoft” that seems to be emerging and releasing really great products like Windows Phone 7. Note, however, that Lasso is being released first on the iPad, not Windows 7 Tablet Edition or even Android. This speaks very clearly about what Microsoft understands about the mobile OS market right now.
HT: John Gruber