I'm not surprised, it was never officially supported in Vista either. But fear not, workarounds were found in Vista for both 32-bit and 64-bit.
The problem though, is that I tried to follow the links on that page to the driver by Ralink, which is the chipset on your linksys. No dice. But hopefully that thread will get you going in the right direction. If someone got it to work in Vista, I'm pretty sure Windows 7 will eventually work as well. This site seems to have an all-in-one driver but I can't tell if it's legit or not.
On a side note, I'm not sure that blaming Windows 7 is where you should direct your anger. It's a shame that neither Ralink nor Linksys have applied for signed drivers for even Vista. How old is that USB dongle or card by the way?