Had a letter today signed by Woosh outgoing general manger of sales and marketing Sandra Geange saying that I must upgrade my modem firmware by Thursday April 13.
Customers who don't upgrade will see a negative impact on network and service performance, apparently.
There's a modem upgrade tool here that's about 9MB in size. Works for both the PC Card and modem.
Get to it, my Wooshie little friends... :)