Joiku went Linux today, as they released a Beta version of Joikuspot, the popular “Make your Phone into a Wifi Hotspot” app.

Installation Instructions:
Surf with your N900 to this page and download & install the file from download link. Reboot the device after installation. JoikuSpot can be found under Applications.
Connect your laptop to internet using your mobile phone via WiFi (WLAN).
JoikuSpot turns your phone to a secure mobile WLAN (WiFi) HotSpot.
Replace USB dongles, cables or Bluetooth. JoikuSpot software installs direct to your phone, and you will carry 3G internet in your pocket, and can share it over Wifi with your friends.
Since this is a Beta, Joiku warns that it might contain a couple bugs or incompatibilities with certain scenarios.
But they’re also open to feedback, so if you’d like to check out the application, do head over to download Joikuspot for Maemo. When you’re installing it, remember No need to register, just click No for e-mail.