There is limited clipart. Select View-->DataSources. Not a lot, but some. I would suspect that Word liscences 14,000 images for 99c and then included them with the $300 package. It isn't likely that OpenOffice is going to pay 99c for you to enjoy clipart with the free program that they are giving you.
I don't know what you mean by group share or bizshare. If you mean, can you use your MS clipart CD with OpenOffice, yes.
There is no linux version of outlook, however, you already have korganizer, kaddressbook, etc installed. Look under your start menu for these. There are a lot of good calendar and address books. Take a look at evolution.