Re: Transaction disappeared in the void...
If the transaction didn't go out immediately at first, like if you weren't connected at the time, it may take up to 2 hours to resend it. Long term, it does keep relentlessly sending it.
I'll shorten that length of time in a future version.
You do need to have downloaded the complete block chain (currently 71040 blocks) before you'll see any confirms. Same with the recipient.