so, i'm writing the electrum-based block explorer myself now, mostly out of boredom (and also due to lack of volunteers).
the code is a major mess and still WIP (eg. no search box and no address handling so far), so consider this an early alpha preview.
http://yacoin.unsha.net/PS: i know that i suck hard at writing javascript
That looks real nice! I throw my hat into the battle of the block explorers with my brand new super fast address balance