Joikuspot turns your N900 into a 3G WiFi hotspot
I just bought a Sprint Overdrive 3G/4G device last Friday and have been very happy with the speeds of the 4G network in the Puget Sound area. I just read this morning that Joikuspot beta for Linux Maemo (N900) is now out as a free application. I immediately downloaded it to my N900 and started testing my PC connected in WiFi mode. Keep in mind that this software is in beta and you will most likely experience issues. I am personally seeing my N900 restart the first time I connect a device with it working just fine after the restart and this is a known issue with this beta.
On T-Mobile 3G here in Seattle I am seeing 1810+ kbps download and 0 kbps upload on my iPhone 3GS using the Speedtest.net application. I believe the upload limitation is a Joikuspot beta limitation and is not helpful if you want to use WiFi to send email, etc.
The application is easy to setup and use. You will see two dials on the main screen to give you indication of the amount of data going up and coming down on your N900. I included a couple of screenshots of the application.