I'm not sure. What I meant was: push down mtgox-price by selling btc on mtgox (everyone still looks at mtgox for price), then wait for "crowd to accept new price" and buy btc as much as you can on intersango, bitcoin.de, localbitcoins.com, #bitcoin-otc, and any other place that doesn't subsequently run to gox to re-buy what they just sold to you, so without moving mtgox price up again (keep mtgox low by selling more BTC on mtgox if necessary).
After you've done your shopping, let the mtgox market correct to original price (hope it doesn't stick at the lower price)
Yes, that's the potential. Official price pushed down; actual supply obtained through alternative methods at a discount, leading to shortages. Whether any large interests are doing it, and to what extent, can be very difficult to ascertain.
- Beat the grass to startle the snakes (everyone selling on a waterfall price decline).
- As selling volume rises, start buying back
- Wait patiently for price to rise above the average buy cost
- Repeat until failure, then retreat to a higher price point where the process can be restarted

There is key resistance at about $12.60 which, once broken, will result in a quick ride to the $15 level. I expect significant resistance there, but with increasing demand it should fall relatively quickly, perhaps within a month or two. After the $15 point, there really isn't much but air to the 2011 bubble highs. A doubling would be nice to see, and since momentum almost invariably overshoots, we might see as much as 20-30% higher than $30 per bitcoin before it falls back to retest the breakout.
Only two things are holding back Bitcoin right now: general awareness, and ease-of-use. When those start to fall, whether the network is capable of handling it or not, growth will be more explosive than the wild ride in 2011. Bitcoin is certainly the ideal vehicle for this kind of activity now, but anyone who thinks it's the only asset these kind of events will occur in needs to think again.