The typical usage here is on the desktop computer for normal everyday usage, and one copy on a laptop for on-the-road and remote recording duties. 

In my studio, I always have a backup computer which has all the necessary software/drivers installed  (it is usually my previous DAW).  It is ready to go in case there is a catastrophic failure during a client's session.  I also have sonar installed on my laptop.   This is technically three installations, but I don't think it violates the spirit of their requirements.  I am the only person who is using it, and I only use one instance at a time.
 
I hate ilok (have it for ProTools and Waves) and I really like Cake's trust-based policy.  It is one of the reasons that I buy every single new version of Sonar.   I've owned them all since CW Pro Audio 8.

Yup - I have Sonar on 3 computers - 2 desktops and 1 laptop, and also am the only one using it, so it is 1 at a time.
 
I also am hugely grateful to Cakewalk for allowing me the trust-based freedom to have it on 3 computers, and it too is one piece of why I put so much effort into staying loyal to the product, and in helping others get the most out of it.  I try to give back to the community, and to Cakewalk.
 
I have the Arturia V Collection, and literally can only have it installed on a single computer.  I believe their mechanism allows me to remove the authorization on this computer, in order for it to be usable on a 2nd computer, and that this process can occur over and over again, but I have not pursued that yet - seems quite the pain.
 
Thanks Cakewalk, for forever.
 
Bob Bone
 

I've got Sonar installed on 3 machines, but due to a lack of limbs, i can only use 1 at a time 

So if I clone myself (as some here have done), can I work on one computer while my clone works on the other one?
 
The problem is even tho my clone is really me, I don't always know where he is or what he's up to, so there's always the off chance that he may be using my 2nd copy of Sonar at the same time I'm using the 1st.
 

BlixYZ
 
I hate ilok (have it for ProTools and Waves) and I really like Cake's trust-based policy. 

Waves ditched the iLok, they now use a cloud system to move your licence from computer to computer; you can also move the licence to a regular USB key and use it like an iLok.

soens
So if I clone myself (as some here have done), can I work on one computer while my clone works on the other one?
 
The problem is even tho my clone is really me, I don't always know where he is or what he's up to, so there's always the off chance that he may be using my 2nd copy of Sonar at the same time I'm using the 1st.
 

I wasn't sure if your smiley meant you were happy, or if it meant that your clone comment was in jest.  In the off-chance you were asking a real question:
 
That would, to the best of my knowledge, violate the terms of the license agreement.  A simple text message, email, or phone call, indicating a session was going to commence by one or the other of yourselves, with the other then making sure to not run a concurrent Sonar session, would be simple to implement, and should then keep the licensing agreement from your end, as far as I can tell.  (I edited the above because my prior wording was stupid).
 
Otherwise, that behavior would seem to warrant picking up a 2nd licensed copy.  It would truly be 2 different folks running the software in different locations at the same time.
 
Bob Bone
 

Well, so much for me, myself, and I, then.

BTW. ASAIK, cloning humans is still illegal in this country, so let's just keep this little secret between us, oK?!

The fact that the question was asked in the first place is commendable. I do believe most people want to do the right thing. Cakewalk showing trust in their customers seems to be returned by most users.