Ok - I found something MUCH better than me drawing up plans (I have NO drawing skill - I was going to have to use my Photoshop!). Here are a couple free online plans:
Camp Bandy Jump Plans
Instant Agility Jump
My jumps are most similiar to the "Instant Agility" jumps. The only difference is that I do my PVC "T"s a little differently so that my bottom bar is actually laying on the ground. Also, I do not use adjustable jump cups - I drill a hole in the upright and put 3 1/2" bolts/nuts though them so I have jumps that are more easily adjustable. Just remember when setting your jump heights (drilling the holes) to account for the extra inch to inch and a half of jump bar height.