Will Dwolla bring back support for bitcoin transactions?
This is still the case, and is still very much possible and active.
[1]: http://venturebeat.com/2012/03/07/tradehill-sues-suing-dwoll...
The ability to send and receive USD from Mt.Gox with Dwolla is still there (although MtGox USD codes are gone from what I've heard), and you can use Dwolla to fill up your Mt.Gox account with USD, which you can use to buy bitcoins.
If there's something I've missed, please speak up! :) I am an unverified Mt.Gox speculator so I can't use Dwolla anymore, only send and receive bitcoins as well as trade.