2) Can shares then be brought and sold by shareholders at whatever price they deem. ie: is there anything stopping them from buying 1 share at 0.1 and then immediately making a sale for 1 share at 0.05?
As an example. let's say you owned 10 AsicMiner shares, and wanted to create a 'pass thru' of sorts on the DEX whereby you would pay dividends to shareholders. You would create a listing with 10 shares and price it under the current going rate on centralised exchange to attract interest.
Is it possible? I couldn't see an 'order-book' for individual assets showing bids and asks, or last ticker price for any asset, only initial issuance with a fixed price.
I've answered your questions respectively
1) The market can have orders of any asset types - that have created + BTC + XCP. BTC is a special case because the protocol can't handle escrow or payments of BTC.
2) Let's say you issue 1,000,000 ASICSHARES. Your address is credited with 1,000,000 ASICSHARES. You then have all 1,000,00 ASICSHARES and can sell to anyone for XCP, BTC or whatever asset you want to get on the DEX. Only then will they be able to sell.
When you sell the stock, you can see the list of shareholders. See:
http://www.blockscan.com/assetInfo.aspx?q=MPTSTOCK
You can then pay dividends in XCP easily. Alternatively, since the shareholder addresses correspond to real Bitcoin addresses, you could just manually send BTC to those addresses.
Yes, there can be an order book for any particular asset. What you see on the DEX is most assets are idle and not put up for sale or has buy orders.