there is several tier of maxis one club membership. AFAIK, to maintain the one club membership, u need to spend as much as what u spending now, with no late payment record. The higher u spend, the more higher ur membership rank i guess.
so to keep your One Club membership alive, just continue to spend more 

for those who keep asking for offer information, let me try to summarize for you :

Newly signed up maxis postpaid user (value 50 and above) enjoy :

1) Free first 2 months of Maxis WBB
2) Purchase E1762 HSPA 7.2Mbps modem for RM180
3) Pay RM58 for 1.5GB / RM 78 for 3GB data from 3rd months onwards (additional RM10 discount for direct debit)

Existing Maxis postpaid user who spent more than RM50 per month for past 6 months enjoy :

1) Free first 2 months of Maxis WBB
2) Free E1762 HSPA 7.2Mbps modem (RM180 upfront payment required, will be reimbursed during next 6 bills at RM30 per month)
3) Pay RM48 for 1.5GB / RM68 for 3GB data from 3rd months onwards

Maxis OneClub member and lucky soul who gotten SMS/calls from maxis :

1) Free 4 months of Maxis WBB
2) Free E1762 HSPA 7.2Mbps modem (RM180 upfront payment required, will be reimbursed during next 6 bills at RM30 per month)
3) pay RM38 for 1.5GB / RM58 for 3GB data from 5th months onwards

FAQ :

Q: What is the speed of this package
A: depends on coverage. This is a bandwidth quota based capping package, so there will be no speed capping if you're within the said data quota. If you're within HSDPA coverage, you'll get a theoretical maximum 7.2Mbps speed, within 3G coverage will be 384kbps max, within GPRS will be about 100kbps and so on.

Q: How long do i have to attached to this service (contract)
A: No minimum subscription, no contract, nothing. Terminate anytime you like.

Q: What if i terminate early, any charges?
A: if you terminate before the RM180 of modem cost is fully reimbursed, the reimbursement will be burnt. Besides that, no additional cost.
Q: Is there any hidden charges besides the one stated above?
A: Handling fees, activation fees, blood sucking fees is all waived by maxis. Pay only the monthly fees after ur 2 or 4 months free period ended.

Q: When does this offer ends
A: 31 December 2009