part of what is new of froyo is that it tends to keep more tasks running, but it manages the memory much more efficiently. you should not be seeing any slowdown on your phone, even if all these tasks are running. now something froyo does not do is play nice with task killers, as froyo basically does not allow third party apps to kill programs. this is why these apps keep restarting after using ATK to kill them. the good news is, you dont need a task killer! i promise, the phone does a spectacular job of managing memory on its own; no need to dive in and do things yourself. if an app is ever causing you problems, you can always go to menu>settings>applications>manage applications and then select the app you want to kill and press the "force stop" button.
Originally Posted by wugawug
now, as far as stripping the bloat, you can only do it if you are rooted. you can delete non-essential bloat programs, but that is not always a great idea, because as you mentioned, it might hinder you from receiving further OTA's. what i do is use titanium backup (an app) to freeze these programs, keeping them on the phone, but preventing them from running