I've been looking at loose tenon joinery but unwilling to buy a domino and having two routers already I'd rather go with what I have. I found this jig with free plans and I've already printed the plans.

Don't know when I will have time to make them, I am assembling a small octagonal patio table right now and wanted to joint them using loose tenon joinery but I don't think I'll have the time so I'll just make a big spline like Norm Abrams did when making a similar table. Still it will have all kinds of uses to make floating tenons in the future (and in the past, too...) so definitely a jig to have.

Here's the jig in question:
http://www.crestonwood.com/mjig.php