The best place to stay in Kathmandu is the Kathmandu Guest House. Not only does it have a range of rooms at all prices, but (and this is important for you) it has internet access on-site. And, most useful this, it's the ONLY place to stay where you don't need to give the rickshaw driver (or tuk-tuk, or taxi...) directions to get there. All other places, they will only drop you in the rough area, but at the KGH they will take you to the door. The location is nice and central, a short walk from Freak Street and Durbar Square.

Good luck! I look forward to reading your next report.