Copy-pasting from Ethereum forums for more reach 
Me and a couple of friends of mine recently put together a rather simple blockchain explorer called
EthereumBlocks It is still in earlier stages of develop, but I can tell you one thing for sure. It is absolutely superb for looking up and tracking the status of your transaction.
Each transaction has an automatically-updated progress bar, that shows a number of confirmations. We picked "12" as our final number since this number is used in the Mist and we also referred to
http://ethereum.stackexchange.com/questions/319/what-number-of-confirmations-is-considered-secure-in-ethereum as a somewhat credible source.
Please note: hovering on "12+" will result in displaying the exact number of confirmations.
I'd also like to highlight the fact that our index page is also automatically updated and shows latest blocks and transactions as they appear on the blockchain.
We are currently developing Charts and Contracts pages, updating mobile version and FAQ and making lots of minor fixes/additions. Regarding Contracts page, we'd like to hear from Ethereum community, maybe there is a specific information that you would like to know about Ethereum Contracts that is not displayed by current block explorers, or you feel it should be more user-friendly.
Don't hesitate to contact me here or at
[email protected] with your questions and/or suggestions. I would love to hear any feedback.
On the completely side note, it would be much appreciated if you anyone could point me in the right direction as to whom I should contact in order to get listed here:
http://www.ethdocs.org/en/latest/contracts-and-transactions/accessing-contracts-and-transactions.html#viewing-contracts-and-transactions. Thanks in advance!
