Do you need to use one tap to get it or are you comfortable with two? If two is ok then download Dolphin Browser HD and do the following:
1. Open Dolphin and go to website you want
2. Long press on address bar
3. Add to speed dial
From there on out whenever you open Dolphin you just tap on the screen where the speed dial is set. You should probably set Dolphin as your default browser as well. I much prefer it over stock.