Do you feel this at the shift point? Or during all loads?

Check the motor mounts.

The main one to check is the front drivers side under the cross over pipe. I've seen a few of these come loose, including mine.

I only feel it at highway speed (60-70 or so).

I think that it might be a motor mount as well, but I'm no mechanic. I've been trying to search the forum for cases like mine and I've noticed a few. Might it be something with my drive axles or alignment? I think that I'll start with the mounts first though since I feel slight vibration coming through the brake pedal when the car is just sitting. I guess I'll keep you guys posted.

I would suggest jacking up the front end and using jack stands. The try rotating the tires back and forth and watch for any slop. Note where the slop is if any. Do this in neutral and watch the other tire. It should also turn. Also check for any play, try turnign the tire like you were turning the corner, watch for slop. Hold on to the top and bottom and wiggle it, watch for slop. Even try pushing the tire in and pull it out. Note any movement and post here.

This probably isn't the thread to ask this, but I've also got a cel code p0102 (something about the maf circuit low fequency). Any ideas on a fix?

Best to start a new thread for a new question.

Try cleaning the MAF with MAF cleaner and see if that helps.

Try cleaning the MAF with MAF Cleaner. You can get the cleaner at most auto parts stores. Don't touch the wire or you could damage it. Clear the code and see if it comes back.

Like I said, I'm no mechanic, but I know a friend who is one. I'll relay what you guys have said.