100000 shares at 1 Satoshi are equal to 1 share at 0.01 BTC - that would not impact the graph very much... please look again at the charts at bitcoincharts.com - the volume is measured in BTC, not shares (which would be a quite weird measure after all). I am seriously against disallowing any kind of bid, especially now that the UI is denominated in BTC (as opposed to the command line client on GLBSE 1.0 in Satoshis). There maybe might be a warning/confirmation popup, if you bid/ask much too low or too high but disallowing such stuff is just not the right thing to do imho.
Ahh, my apologies, I was thinking of the current charts just with a different display type. Those charts are also clipped themselves; looking at the mtGoxUSD chart, the range only goes from $8-$15, excluding small orders (and even ones that were active a few months ago) and asks at the higher end (I'd personally love to sell my coins for $25 a piece, but that chart won't even show it).A chart showing the shares (cumulative or otherwise) is still of interest to me, but a chart by value would make it much easier to see what my current holdings are worth if I had to sell off immediately (I think either chart would show this information, it's just easier). The only real difference is plotting price (on the X axis) against either shares or price times shares.
The other thing to consider about the bitcoincharts graph is that you're trading "shares" of BTC on that graph, so it's only natural to show cumulative results in BTC.
Disallowing orders may not be the best way to handle it you're right, but I do see it as disruptive to say the least right now.
The current API is also in satoshis, my understanding is that it's much more machine readable where the UI BTC prices are easier for humans to read (or at least for me personally).
This will be huge win and your db load will drop dramatically. 
and will give us a kind of hot swap should one of the two servers go down for whatever reason.