How to move money to the default bitcoind wallet? I am using bitcoind and have been playing around.  

Recently I used the sendtoaddress command to send 0.50btc without realizing the implications of this command versus sendfrom.  Now when I list my accounts I see the following: 

$ bitcoind listaccounts
{
    "" : -0.60010000,
    "w1" : 0.74584297,
    "w2" : 0.00022000,
    "w3" : 0.00000000
}


So at this point my main/default wallet has -0.60010000 and my w1 wallet shows 0.74584297.  

I can list the default wallet address using: 

$ bitcoind getaddressesbyaccount "" 


However, is it possible to transfer funds locally to the default wallet or should I just use a explicit sendfrom with w2's address? 

Is there a way to move 0.74584297 to the default wallet without having to send over the network and incur a fee? 

Thanks!
For this, we have the bitcoind move command:

$ bitcoind move "w1" "" &lt;amount&gt;


These kinds of transactions do not incur a fee:

https://en.bitcoin.it/wiki/Accounts_explained#Account_-.3E_Account_Transfers