According to the::unwired information, the recently previewed T-Mobile compact III (also known as HTC Artemis) will definitely lack W-LAN support, even if the original HTC reference design of the HTC Artemis has W-LAN b and g onboard.
Yesterday I've spoken with some folks and they've confirmed what we have already seen during T-Mobile's MDA compact III presentation at the IFA.
It's not clear yet, why T-Mobile decided to leave W-LAN (maybe in favor of reduced battery drain, price or weight) but it's definitely a bad decision, if it turns out to be seriously true.

In Germany, T-Mobile operates (together with T-Com) the largest public HotSpot W-LAN network, virtually available everywhere and T-Mobile web'n'walk tariffs even includes a limited amount of free W-LAN use at these HotSpots. So cutting off the W-LAN functionality is cutting off the full benefit, a user can get with a web'n'walk plan.

Now we have to wait which other operators will also carry the HTC Artemis and how these carriers will deal with W-LAN.

Cheers ~ Arne