Android (with Windows): To unofficially tether and use your Android's mobile web on your laptop, you previously had three options: rooting, wonky proxies and purchasing PDAnet. Now there's formerly BlackBerry-only Tether, at about the same price as PDAnet. What's the difference?
Right now, the price difference is notable. Tether is on sale at launch for $US24.99, normally $US29.99, while PDAnet is $US15.95, normally $US23.95. The trial modes are different too: Tether offers a week of full service free, while PDAnet lets you use a version that restricts HTTPS access for free, then charges for the full upgrade. Both, mind you, are cheaper than two months' time paying the recurring fees of many mobile carriers.
Tether is USB-based, too, while PDAnet offers a Bluetooth-based connection, though that's not necessarily a real lifesaver. Both software packages make speed claims, though Tether's do seem a tad more realistic, clocking a typical tethering sessions at just under 2.5 Mbps in download. Tether might have the edge over PDAnet in ease of install and interface, though — but, then again, the user who's tethering their phone outside mobile provider permission probably has the technical savvy, or at least drive, to stick it out through a slightly tricky manoeuvre or two. If PDAnet didn't work for you, or just didn't gibe with your system or phone, give Tether a try — it supports all Android phones, 1.5 and above.
Tether downloads free in the Market with a one-week trial, then requires a licence after that. It requires Windows software to tether at the moment, but the developer states a Mac version is on the way.