i just did the same thing, i cant afford to lose 90 days if they go under, so i had no choice.  i finally got it in my head that if they are 90 days over they are probably going down the slippery slope and dragging me (begging for payment) with them !  Its hard to cut them off (or put on hold) when business is sooo slow.  i think its just a matter of time before the payments come to a complete stop, the economy is affecting the big and small companies alike.  Like us,  i think they just keep working along hoping they get a payment from their client, and then we keep working hoping they will send us a payment,  sooner or later its gonna come to end, with noone getting paid.   its a tough situation.