So I tried out my first UL trip. Started out in San Francisco, marched across the GG Bridge and up to Muir Beach on the Coastal Trail. Then I used the Heather Cut-off to the Coastal View Trail and stayed the night at Pantoll before catching a ride home.
===========================
Here's a list of my gear (or most of it):

REI Kilo Flash Women's Reg 18
Big Agnes Air Core (no stuffsack) 21
GG Thinlight 2
MSR Pocket Rocket 3
IsoPro 4oz fuel 8
SteriPen Adventurer 3.6
Nalgene 32 oz bottle 3.5
Smartwool Light Hiker Socks 2.6
Petzl Tikka Headlamp 2.75
Duofold polypropylene pants 6
5x9 SilTarp 8
NorthFace Recon 18
HeatSheets Bivy 4
REI TiWare Mug 2.4
BPL Pillow 0.9
Hat 3
Motorola Razr Phone 3.5

Total 6.89

I modified my old North Face Recon backpack and it worked great. Pretty roomy, so not sure I'll be getting a new pack right away. For a bivy, I used an Adventure Medical Kits HeatSheets that I modified with velcro for easy access. Though I don't think I really needed it since it was so dry and marginally warm.

Also, I took a hint from some a MYOG thread here and added a band of ribbon to the sleeping pad to hold my BPL pillow in place and it worked great. Made a little dimple for that cradled my head nicely. In the future, I think I may add velcro to the tarp so I can slight my windshirt over the "door" and attach the sides to the tarp to get more coverage.
===============================


All in all, I had a really great time and was astonished at how far I was able to get with a light pack (about 15 miles!!) I've never hiked so far in one day, and it taught me....that I need better shoes.

Oh, and I saw a bobcat on the Heather Cut-off Trail, which was just the icing on the cake.

Here's a pic of my tarp (Thanks Ken Thompson):




and the view (shoddy with the camera phone) of San Francisco from the coastal trail:

Can you reuse the Heat Sheets Bivy?

Yes. Though it will never roll as small as it comes originally, and when cutting it you have to stay on the seam because the material will rip easily. I would think it could work for a week or so if you are careful to avoid rocks and use it as a supplement to a tarp. In case of a downpour I planned on using my pack liner to add extra protection.

Well done a nice and simple overnight trip something many of us do and as you have shown it is easy to get a very light pack for such a trip. I also like that you used a 5 by 9 tarp as I think that a 5 by 8 can be a little short. Did you make your own tarp?

I purchased it from a member here. Worked great and was affordable.

Congrats on your success! Don't you wonder what you were carrying the other stuff for? Glad the tarp worked out for you. I was stoked to see a photo of it so soon!