We've had quite a few interesting things sent to us by Microsoft... the most interesting seems to be the Red Chilli Plant seeds (pre-potted in a plant-tube) to promote their product Microsoft Umbraco CMS.
It's taken an age for the little guy to sprout... probably since the office isn't the best place for it to grow... but he's finally got leaves! Huzzah! I'll repot him in a few weeks time. I have no idea why the plant's a he... but he just is. I've still not named him though... Suggestions in the comments!
But I am still looking forward to the next promotional gift we get from Microsoft. They do tend to send something that either gives us a giggle, or at least sparks a little discussion.