+1: If you're within cities, it generally doesn't matter, which network you use. I've learnt that Vodafone and T-Mobile are the more expensive solutions and generally like to sell you sim-locked devices.

I'm quite happy with a cheapo-solution, using a (non-sim-lock) stick and prepaid plan from "Aldi", one of the nation wide supermarket chains. Stick: ~50€, monthly flatrate: ~15€ (careful: if you've got enough money prepaid and not cancelled the monthly flatrate, it's automatically continued the next month) or ~2 or 3 € per day. They say to limit the speed from 5GB (monthly) or 1GB (daily) on. This is a resold "E-Plus" network access.

Windows "wizard" software is provided on the stick. Access also works well with Ubuntu "Karmic Koala" (without the windows software, of course).

Thanks for pointing this out. Actually NEST is based on BEAM, which is currently in version 4.5 (this tool is the first one referenced on the esa page you linked)

If you are able to read german (or your coworkers are) - Frank Westphal has already written a good comparison for JUnit 3.8 and 4.0 at http://www.frankwestphal.de/JUnit4.0.html. You might want to try this.