If you are looking for a reasonably easy way to put together a hoist/lift for your TJ/LJ hardtop, this guy's video is worth watching.
Over the weekend, I followed the tutorial step by step and am glad to report that it actually works. Nothing to write home about--but it gets it done and doesn't cost 600 bucks. (more like 60 actually, 30 for the 2x4s and 2x3s, 30 for the straps, bolts, etc..)
Some random observations:
1)The top hoisted belongs on an LJ, the straps get it up with no problem-likely it'd be easier with a TJ;
2)Not sure the setup as is is a long term solution. The structure does sway at the slightest push. With a 7 year old constantly running around in the drive way, I wouldn't feel comfortable leaving it up long term. But for a short term fix, works great.
3)Dropping the top is almost as easy/uneventful as lifting it. Basically involves backing the jeep in as straight as possible, once the two front latches are lined up with the holes above the wind shield, the rest of it is pretty much aligned and ready to go back on.
Hope this is helpful for those who are searching for a way to get the top off but don't have a garage.