Just got an email from TCL posted below saying the 40GBg plan is now 50GB. Checked their plans page and it's been updated there.
The Usage meter seems to be down though at the moment.
Here's an early Valentine's present from TelstraClear... an extra 10GB
of broadband usage every month! 50GB
On 27 January 2010 we upgraded your LightSpeed 40G plan to 50G.
For no extra cost, you can now enjoy an extra 10GB of surfing,
downloading or gaming every month with TelstraClear InHome.
Happy Valentines and thank you for choosing TelstraClear.
The Team at TelstraClear
Note: Depending on your billing period and how much usage you have
currently used, usage notification emails you have already received may
no longer apply. You may also receive additional notification emails
this month as your usage allowance has been increased. The online usage
meter will reflect this change and your current situation.