Preferably in northwest SA, feelin kinda loosy goosy under hard acceleration on the freeway, anyone know where I can take it to just get it checked out?

did you hit anything? you might just want to jack it up and take a look underneath and look for anything messed up or loose

Havent hit anything serious, and weve put it up on a lift and looked it over a couple weeks ago but it still feels odd. Floaty if that makes sense.

Sounds like a blown shock to me. Go to all four corners and give each corner a good hard push down. If it rebounds more than once, that's the corner with the blown shock.

Oh, and that doesn't matter.
How low is the car?
Does it still have bump stops/or are the bump stops cut enough to still work?

It is quite possible, if low enough and without bumps, that you blew the shock. Otherwise, age or a good pothole could have done you in. Do the corner check, like I said above, and let us know.