clipped from: www.f-secure.com   
Q: I heard something really bad is going to happen on the Internet on April 1st! Will it?
A: No, not really.

Q: Seriously, the Conficker worm is going to do something bad on April 1st, right?
A: The Conficker aka Downadup worm is going to change it's operation a bit, but that's unlikely to cause anything visible on April 1st.
: So… this means that the attackers could use this download channel to run any program on all the machines?
A: On all the machines that are infected with the latest version of the worm, yes.

Q: But what's this peer-to-peer functionality I've heard about?
A: The worm has some peer-to-peer functionality which means that infected computers can communicate with each other without the need for a server.
Q: But doesn't that mean that if the bad guys wanted to run something on those machines, they don't need to wait for April 1st?
A: Yes! Which is another reason why it's unlikely anything major will happen on April 1st.