As announced in a webcast this morning, Office for iPad, specifically Word, Excel, and PowerPoint, is available now via the Apple App Store. Microsoft has also posted a number of new posts on todays news, including:

A cloud for everyone, on every device – Satya Nadella’s post

Announcing the Office you love, now on the iPad – the Office Blog post

The press briefing on-demand webcast

Enterprise Mobility for Every Business and Every Device – the Enterprise Mobility Suite blog post

and this Office for iPad YouTube video: