Not really, and there is a ton of case law on the topic. The way (civil) discovery works makes the SaaS concern far less of an issue.
Civil cases are NOT criminal or national security -- this is not the CIA, it is not a secret court, it is not being tapped... it doesn't even rise to the level of a search warrant. It is up to the party being requested on to produce the documents. So, if we get a discovery request, we have to deliver the documents to fulfill it.
For example, we have an automatic email cleanup after 90 days -- both technically, and in policy. This means if we are served with discovery, we can show the policy, show we have taken steps to follow our policy and produce the last 90 days of email. Same goes for Hipchat logs.
Now, they could make some crazy play to extend discovery to Google or Atlassian. There are a couple problems with this, the first of which is such an insanely broad request would be flat out denied as fishing. If it wasn't, they would fight it kicking and screaming because they don't want to be involved in every civil case of every one of their of clients. They then would have to actually have the data, which in the no logging situation, hopefully they never had.
Discovery is often used as a tool of attrition, to wear down the guy with the smaller wallet -- run lean (by policy and design) and if you ever get a request for discovery -- you can fulfill it quickly and completely.