Dont get the Motorola Milestone (Droid in US) - really flimsy. especially for a business user.
If you want to go Android (which is compatible with MS word, office, outlook, etc) I would say go the Motorola Droid Pro, for a smart business looking design. It is aimed at the BlackBerry market demographic afterall.
Other options would be HTC android based phones. These are very good quality phones with a range of prices and features. Look around your area for what is available on your local carriers. HTC is a brand which makes business-oriented phones as well as consumer-oriented. HTC would be my choice, purely as they have a good track-record, but I am biased
I notice you want 'conferenceing' - by which i assume you mean face-to-face video? If so, you will be wanting a phone with a front-facing camera preferably with a decent megapixel size and quality. This means you are generally limited to the most recent models of android phone, which you do pay a premium for. However, if you are happy to go with say a slightly older Nokia with a Symbian-based OS, you can get a model of phone with a front facing camera pretty cheaply