IMAs: Make it your world
There are a couple of ways to crack the IMA nut, first, a lot of good posts on the subject, so I will try not to restate them.
As an IMA assigned to an ADuty command, and a former unit puke, I like the change. Per FYr I only have to work 24 UTAs(actually 12 days if i double up on them) and 14 days of Annual Training, plus it is possible, depending on the availability of ADuty days to work extra days. I'm a category B, so I get paid, my wife really likes that part.
There are a variety of ways to perform your duty, as there are positions. You could join PACAF or some other far flung locale, and actually work out of a local unit, not saying it will happen, but some people do get that option. Additionally, the real sweet deal is if you have a project, you might be able to telecommute, which is authorized by the regs. So, it ultimately comes down to getting permission. Some entities might be hurting that they would be willing to work with you, but be forewarned, all deals are off once you get a new supervisor, ha!
Another way is to find a unit or a position you like and see if they will try to create an IMA slot for you, or if you can be double slotted with a current IMA. The respective bases have a Base Individual Mobilization Augmentee Administrator (BIMAA), who should have a list of all the IMA slots on the base.
see
http://arpc.afrc.af.mil/bimaas.htm for their directory. Also I think you have to log in now, see the cite below on how to log in.
http://arpc.afrc.af.mil/dpabb/IAMUNITselres brf.doc
The general page on IMA stuff is this
http://arpc.afrc.af.mil/assignments/Off IMA Assign.htm
The Volunteer Reserve System is a temp jobs board, sometimes they are looking for any AFSCs and the locale or number of days may not be desireable, but you might find something that interests you.
https://vrs.afrc.af.mil/
Of course all of this is explained in the latest Reserve Guide you can download it is an Adobe doc, so it is a great resource, see section 1.4 of the guide for more info about searching for an IMA job.
http://arpc.afrc.af.mil/dpst/irguide.pdf
Better yet, try this Hill site, it has a listing of current slots, it gives you a good perspective on types of slots, plus they are helpful.
http://www.hill.af.mil/ima/opportunities.shtml
Hope this helps!