Still using Android 2.2? Even with Google’s latest Android 2.2.1 update, you are probably not up to speed unless you’ve got the Android 2.3 Gingerbread ROM. Actually there’s a bunch out there now but the one I recommend to install on your rooted Nexus One is the LeoGingerbread ROM.
Here’s the files you need to update your rooted Nexus One to LeoGingerbread Android 2.3.1 ROM, highly recommended. (Thanks to XDA Developers!)
The speed of Android 2.3 isn’t much faster than Android 2.2 but there’s a load of new features such as this cursor for your text input: