trading btc to alt coins between wallets.

[Gallah]

What are the options available for changing bitcoins into altcoins and storing them in online and offline wallets. I recentry read a post on a  new exchange that provides this service although lost the link.

Am I correct in assuming the majority of online exchanges only allow withdraw in fiat and btc?

I also know you can buy and sell alt coins on sites such as cryptothrift although you need to find a buyer/seller.

Thanks.

[alt19]

Am I correct in assuming the majority of online exchanges only allow withdraw in fiat and btc?

No.  btc-e.com, cryptsy.com, mintpal.com poloniex.com, bter.com, bittrex.com are the biggest exchanges and they allow coin withdrawals