I wrote an article earlier this year about this topic -- actually about dumping all the cargo in general -- called Zen Pockets. As discussed in that, I went with a clear plastic sleeve from a convention lanyard, although a suitcase tag sleeve would work just as well, with only the basics.

Have you thought of one of those inserts they include in overly complicated women's wallets? I have one I just threw on the Goodwill pile that has:

--a clear slot for DL
--four add'l slots
--two interior slip pockets, either of which could accommodate index cards/cash/receipts

Only question is whether after you shoved all that crap in there, whether you could comfortably clip a pen into the fold.

Then again, I just chucked my freebie checkbook insert onto the Goodwill pile. Black nylon, fairly neutral, gender-wise. Email me off the boards with shipping info and it's yours for the asking.

UPDATE: Just double-checked and there's an additional full-sized pocket on the outside, for a total of 3 index-card/money-sized pockets and 4 credit-card-sized ones. Woo-hoo! Pocket bonanza!

Here's lifehacker's input on this subject:

http://lifehacker.com/software/fashion-hacks/fashion-hack-avoid-wallet-butt-bulge-135796.php

I have my eye on this, which I think fits the bill exactly. Not designed as a wallet, but it would work perfectly well as one, and doesn't have extraneous stuff. http://www.levenger.com/PAGETEMPLATES/PRODUCT/Product.asp?Params=Category=11-76|PageID=2269|Level=2-3

For those who don't feel like checking the URL, it's a small, skinny leather case that folds like a book. It has two pockets for 3x5 cards, 2 pockets for business or credit cards, a pocket with a window for your ID, a sleeve for a pen, a pocket for bills and a pocket for receipts. It's $44, which is sort of pricy, although I notice one of the colors is on sale for 20 bucks. I have some of their other leather stuff, and I've been happy with the quality. They also have overpriced 3x5 cards which I have to admit are pretty nice--the card stock is heavy and very smooth. Good for fountain pen geeks like myself, although I personally wouldn't carry an FP in this case.

Safety pin.
A small one. Just hook it in to your wallet or anything else made of some kind of cloth and that you always have with you (I've got one hooked into my Leatherman holster).

It's almost free, and it may at some point save the day. Somehow.

I did a review of the wallet I love for Make #3. Not quite perfect for your specs, but it is terrific and compact.

http://tinyurl.com/beteh

I saw a good one at office deopt. It had a todo list on one side. I will look around for a link. I know it was less than 20.00.

i found the wallet on a trip to office Depot today its is called " Franklin Covey's Task list Wallet" it is style # 755235 at a cost of 14.99

I am very sorry but i was not able to find an online link to provide. the lists apear to be a 3x5 index card so this could be a good HipsterPDA wallet as well. let me know if this helped!!!

A friend got me something awesome as a holiday gift:

PicoPad!!!

It's a little tiny folder with a tiny pad of post-its and a tiny pen. It easily fits in your wallet so that you'll ALWAYS have something to write on/with (as long as you have your wallet) and won't ever have to worry about unnecessarily relying on your onboard memory.