I think Mac went with Oracle. The other company they were deciding against I hadn't heard of before.
I went to the demo which allowed students to have some input on what they saw (This was last year some time in Feb or something like that). The Oracle one didn't look as appealing to me and I came out liking the other one better. If any of you have seen the Waterloo HR system (from co-op or summer work), it sort of had that feeling to it. The other company's choice had a iGoogle feel to it which looked easier to use. We didn't get to try the system, but some things were explained and demoed to us. There was an old thread about this, maybe I or someone else could dig it up. IIRC, the course selection was by far more impressive than SOLAR (at least Oracle's way of doing it, don't remember the other company's). I think you could go in beforehand to choose all your courses, thus eliminating the first come first serve that comes with SOLAR. Don't remember what happens after that.
Sorry for the rant, I'm just writing whatever comes to mind.
EDIT: To OP: OSCARplus not included, still separate. MacLife I believe will stay the same, since its run by SAS. I think MOSAIC (if we can call it that) is more so a replacement for MUGSI as a whole (which I consider SOLAR to be apart of).
says thanks to particle for this post.