just went to another hotel and got speeds of 600-700kb/s which was fine.
back at the usual hotel again and back down to 60-140kb/s (unwatchable).
speedtest tells me I have over 2.7mb/s download, and I can watch streaming video perfectly from many sites (such as justin tv and project free tv)
any ideas anyone?
What I understand from your post is that you're having problems with the Slingbox video quality.
In this case, you can check the following links which provide information about the possible reasons why you might be having this problem. Besides that and based on what you're saying, this could be a restriction from the hotel as well.