This question stems from Joes topic on jig fishing.  I myself have focused alot on the craw imitation of jig fishing where it is highly sucessful.  To build myself as more rounded I want to focus more on the jig fishing as swim jig fishing and shad imitations.

What colors do you guys use and the techniques you use for your sucess?

rhf fishes the swim jig with great results. usually in white, brown, or green pumpkin. use a trailer the 'thumps' a little. the small sizemic toads, paca chunks, anything that puts off a little vibration (rage tail chunk would probably be great)

I tend to slow roll it like a spinner bait.  I have noticed that it seems to work better in lakes that have a lot of water plants in them.  For hydrilla, I'll swim it over the top and then let the jig fall into a hole.  If there is a solid weed line, I'll swim the jig parallel to it.  My usual color is a blue/black jig with a matching trailer.

I never really swam a jig much until I started rigging my jigs with double trailers (Paca chunk plus Joe's) like I described a while back here:
J4F secret jig-rigging

....but since then, I've caught a whole lotta fish while swimming it.  At first, I was only rigging heavy 1-ounce jigs that way,..but now I tend to rig all my Gman jigs (1/4, 1/2 & 1 oz) this same way for 3 reasons:
1) You can make better casts because of the extra weight,..yet they enter the water softer!
2) The extra rubber makes them all sink slower,...the 1/4 ounce ones are REALLY slow sinkers this way!
3) They become dual-purpose baits that are just as effective while swimming or dragging over the bottom.

I never set out to just swim a jig,..but I do swim them in the following situations now:
-  Just for a changeup,..to try and pick up any fish that are in the "chase-mode" rather than those that you would get by fishing it on the bottom.
-  When I am just running from one spot to another rapidly with the trolling motor,  I can show the bait to a few more fish along the way!  (I've also caught a few just trolling it behind my kayak as I'm paddling rapidly to another spot..)
-  Shallow (especially when it's windy) flats that happen to be near some other cover that I am fishing "normally".

In almost all cases,..I'm just using a straight and fairly rapid retrieve when I swim the jig and although there have been a few fish that I've gotten with white or white/chartreuse jigs,...the vast majority of my swim-jig fish have come from the same dark jig that I was also fishing in the normal manner.