So do we have the ability to take advantage of any of these cap related deals?
Not really, because we're not under the cap. These teams that want cap space don't want to have to take players with actual salary back. Hence, they have to trade with teams that are under the cap that only have to trade second round picks in return for players with significant salary.
If Rasheed were officially retired, then maybe the C's could pull off a trade for a player of some significance by tonight, but as that isn't the case, I don't see how that could happen.