I've been working on an HTML5 wallet - located at memorywallet.org
http://memorywallet.orgIt enables users to create transactions using just a memory wallet phrase or private key. It keeps all encoding and private keys on the browser.
I've focused on usability for the development. It's super easy to use.
So far, it supports BTC and MMC - but I want to expand it to support more altcoins.
If you'd like an HTML5 wallet for your altcoin you need to have two services running -
1. To get unspent transactions
http://mmcexplorer.info/unspent?data=2. To push new transactions
http://mmcexplorer.info/pushtxSend me the details and I'll get your coin added.