Many people are awaiting the availability of the Official 5.0 OS for their BlackBerry Devices, myself included and from what I can gather this waiting is not the fault of RIM™. RIM™ has made the 5.0 OS available to all carriers in Dec. 2009 and it is up to our carriers to now get this update to us.
However you can check out a demo video that @emkwan did of the 5.0 OS on a BlackBerry Bold. You can look at this video two ways. What you are missing out on or what you are going to have. lol. However the Official 5.0 OS looks really cool.
Source (emkwan YouTube Channel)