Generally, the aerials you get with a card/stick are not much use, unless you have very good reception.
Depending on your budget, you can adopt an alternative.
I have a Sony LocationFree box, linked into my Sky box at home. Using this, I can now watch all of my home services on a laptop or PSP anywhere there is a WiFi connection available. It also allows me to change channels, as if I were sat at home.
Handy when you're stuck in a hotel with rubbish TV!