GDeadphans: I don't actually use a sleep pad. I have an ENO hammock, and with summer temps and humidity being what they are around here, I find I don't need/want one.

That being said, I found a Thermarest sit pad on Backcountry.com that looked interesting. Next time I'm in a brick-and-mortar store that has them, I'll give them a look to see if it's what I really want. I may also try MYOG.

RHodo: Now that looks like it might be something I'd be interested in. I'll give it a closer look when I have some time.

Thanks everyone for your help... any further info is always appreciated!