you may not even need to remove apps. if you have done a lot of browsing you could have a pretty large cache already. in the browser hit the menu key then go to More then scroll all the way down to Settings. then about halfway down you can delete cache, history, etc.
btw if you ever want to see which apps are using the most data you can go to Settings > Applications > Manage applications then it will give you a list of your apps and the space they are using. you can then hit the menu key to sort by size. clicking on the apps will give you the option to uninstall or delete saved data within the app to free up space.