You can also recharge alkalines in a standard nicad charger, it's just best if you keep it within your sight... I've heard this can cause the batteries to leak, though it's never happened in my experience, plus alkaline batteries leaking isn't a huge problem, it's not corrosive, not flammable, it just makes a bit of a mess you can clean up with vinegar. I've heard this is unsafe, though I've never had a problem and I've done it quite a few times...
They only charge a couple times though, after the third charge or so they'll be reduced in capacity, and after maybe 10 charges they'll no longer accept a charge at all.
If you're uncomfortable using a nicad charger, they make "special alkalines" with "special chargers" under a brand called Pure Energy... They can be found at most stores around here and the chargers are only like $15... The batteries are regular alkaline batteries and the charger is a regular alkaline charger (ie: the same as a nicad charger, only with lower amperage and a more robust full-charge-detection circuit)... OR, if you're really feeling adventurous, you can hook up something like a rckstr driver set to something low like 50mA and use that to charge your batteries... just remember to unplug them when you think they're full or they start to get
warm.