Slashdot listed yesterday that the NY Times reported that M$ was scrapping it's .Net "My Services" rented software because it wasn't selling.
Other than that, .Net itself isn't subscription-ware in any particular sense. However, Microsoft still has adopted a stronger subscription-like licensing model within the past year. Their licensing rates now optimize for companies willing to upgrade every 2 years (previously it was less costly/restrictive).
So even though Office isn't strictly subscription-ware, it is beginning to look that way for many organizations. We'll have to see how it actually plays out, and if StarOffice 6.0 can gain any market share.
Note there's a lot of high-end commercial software out there that is de facto subscription-ware as well. For example, although you already pay a hefty license fee to deploy Oracle, you also pay for an additional expensive annual support contract.