I personnaly think you are over-optimistic about the situation, Guy. The banks for the moment aren't "very sound", they are in panic mode. They haven't stopped their activity for the moment, but people just don't trust any sort of lending for the moment, and even the LIBOR rate is going trough the roof. Treasury bonds have sold at -1% only in the past months, which means people didn't trusted a bank to hold their money, they'd rather have the governement do it at loss.
Sure, the average consumer haven't felt directly the problem - yet. But that's because many bank hopes that the bailout is going to happen, and they know that if they actually stop the credit for the consumers, it's gonna be the end.
And 700 billion dollars injected to cover for the junk investments the financial sector has made won't plunge us into an inflationary crisis. You won't create new money, you will simply garantee the asset they own. If you were giving money directly to the consumers, then yes. But the banks will be using that money to lend to solid investors, not to invest themselves.
And except if the governement starts acting really stupidly - which will never happen -, never the money will become "worthless". At worst, in the worst-case senario when you actually give the money to the stupid consumers, you might have a surge in inflation, but won't make the money "worthless". That's an hyperbole, if I've ever seen one.
A Depression is an actual possibility if nothing happens, most economists agree on that. A Zimbabwe-like inflation crisis? Nobody actually believes that, save you.