Unconfirmed tx going on for about 10 hours now issued from blockchain.info wallet.
There's a tx fee included. Is there such an element of chance that no miners have picked up this tx? If so, lame.
If the number shown by BitcoinCharts is correct, there is currently a way high number of unconfirmed transactions (it shows 12K trxs, nearly 10K of which as being "low priority").
If that is true then there is probably spamming of the blockchain occurring -- record levels of it perhaps.
Generally transactions with a fee paid are confirmed fairly quickly, and the only ones of these that aren't are those that have some characteristic that puts them in the slow lane, along with the spam-like transactions.
For instance, if your transaction includes outputs of another transaction which hasn't confirmed, then your transaction isn't even considered, regardless of how many fees you've paid. So the solution to that is to not use as inputs any unconfirmed transaction.
Another instance is where your transaction is large (as in data size, ... where it consists of many "spam-like" microtransactions). If that is the case, then a higher fee will need to be paid.
Does your transaction exhibit any of these oddities that might contribute to it not confirming promptly?