Any chance you could post more information about the pausing behavior you are seeing here? Is it with web projects, class library projects, windows projects? Also -- do you see it in source view or design-view?
One thing I have seen a few cases of is where the HTML validation engine can pause things slightly when typing/moving in big HTML documents. This seems to be disk IO bound (I only see this on my laptop -- not my desktop). Here is a blog post that shows how to disable it if that is your issue: http://weblogs.asp.net/scottgu/archive/2005/11/23/431350.aspx
One other change I'd recommend if you see things slowing down every now and then is to disable the "auto-recover" feature. You can turn this off from tools->options->auto-recover.
Hope this helps,