Yes, sanctions are a strange beast. I would tend to agree that they are not likely to affect Mugabe too much, but he's facing a foreign exchange crisis and hyperinflation regardless of sanctions. Both of these have the power to collapse the country anyway.
The only reason the fixed exchange rate regime (Z$55 to US$1 currently) has 'survived' is because trading is taking place in the black market for currency, apparently at levels of Z$130 to US$1. I'm not sure if the central bank could maintain the currency at the official level too much longer.
So what do you think Bush could or should do? You are quite derisive of him for not paying any attention to Zimbabwe, but what can he do, bar putting sanctions on? I'm pretty sure none of you guys would support any direct action from the US anyway! You say that Bush does not care about Zimbabwe and the region, but the US took direct action in Yugoslavia/Kosovo - and that is not a strategicaly important area of the world for the US either, at least as far as I know. This demonstrates to me that the US can, and does act on "humanitarian" grounds at times - even if you don't agree with the form of the action.
giznad: I too share your hope for a revolution, but if sanctions are hoped as a means to create this, I always get a bit nervous. This issue has surrounded a lot of the criticism of the sanctions against Iraq - that they essentially are designed to agitate the population, hope they blame the leader/dictator for it, and overthrow him via a revolution. In Iraq, this has not worked as Saddam has such skill and control over the population and has successfully painted the Western world as the culprits, dampening any support for such an overthrow. Could this too happen in Zimbabwe, or does the lack of oil mean Mugabe has less to play with economically?
I'd like to see him out of power, and hopefully the MDC would be better. Zimbabwe has shown so much promise, and it's such a shame that another African country has fallen into the mire.