A bit smaller than BTC Guild actually .
The point is still valid though, some pools have been attacked/had downtime lately, which removes them from the pie chart temporarily. Reloading bitcoinwatch's pie chart right now shows Other roughly the size of BTC Guild / BTCMine.
Deepbit is and has been up for awhile at well over 1TH/s, but they were not represented on the pie chart and thus were lumped in with other. The chart is NOT wildly inaccurate and in fact it is precisely accurate [as of the time sample they use to generate the chart anyway]. But, if they aren't consuming the JSON data or the JSON data is not available from a pool, then the processing power generated by pools not represented falls under "other". What would you expect them to put there? I see deepbit is back there now and "other" is precisely reduced accordingly.
Let's get real and let this thread die a timely death.