What is the maximum length of time you wait for a transaction to come through?

I transferred a Bitcoin from VirWoX approx 8 hours ago which is my first Bitcoin transaction.  The BitCoin client is showing 1 connection (has been as high as 6 and hovered at 3 for some time).

How long should I wait before getting worried and how many connections do you guys average at and does generating influence speed?

Thanks for any help.