For the record - I've answered in u-boot thread:
http://talk.maemo.org/showpost.php?p...&postcount=756
...as it's OT here and I don't want to clutter kernel-power thread.
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As for new wifi modules - I can (happily) report that ad-hoc wifi seems to be working perfectly fine now Apart from obvious lack of device reboot on trying to establish ad-hoc network, I was able to set-up one, connect to it from laptop, and share N900's cellular internet access through it. Same thing worked in reverse.

Here good news end, though. As for power consumption, I did some tests - with everything disabled, screen locked and wifi ON but *not* connected to anything, power draw is the same for vanilla and injection modules. But, with device connected to managed network (access point) but idle (no VoIP accounts, no ssh, no anything) with vanilla drivers, device use ~15-20 mA. The same situation for injection modules results in ~200 mA current draw

During heavy network usage and/or ad-hoc, vanilla and injection modules result in roughly the same power draw, so I suppose that some powersaving during idle is still lacking in replacement modules. This gives biiig regression re standby time, so using them instead of vanilla ones all the time doesn't seem to be such a good idea YET, after all

/Estel