Meh. The notion that banks aren't lending when they have huge reserves is bunk. When the crisis hit, many were leveraged at 30:1 or 40:1, which is really really ridiculous and exceedingly dangerous, regardless of the theoretical coverage from hedging. Normal and sane ratios are 10:1 or 12:1, but they didn't care, because the money that banking execs put in their pockets from such huge leverage meant they were set for life, and because they knew that the Greenspan Put was in effect. They knew that from the handling of the LTCM affair in 1998.
So what's happening now is that they were granted the cash and the time to unwind those absurdly leveraged positions, which means they can't lend as much, not nearly as much. What they used to get away with won't fly anymore, either, not with the regulators, ratings agencies or their investors, either. Their losses are still playing out, so they need to make money in the meanwhile to partially offset that, if they're to survive.
One of the ways banks have been making money recently has been in the dollar carry trade- borrowing in dollars, lending in other currencies, overseas, pocketing the difference in rates, playing the incestuous hedge shell game against loss... What Bernanke recently told 'em was to get out of that while the getting was good.. because increased domestic interest rates will kill that and anybody stuck with too much of it in a veritable heartbeat...