I use this - and it's great with my slow internet connection. It's totally transparent, and I only notice it if my vm running it is down. And despite the name,

I use this - and it's great with my slow internet connection. It's totally transparent, and I only notice it if my vm running it is down. And despite the name, newer versions work with yum too (although I found I had to disable the fastest mirror yum plugin to get reliable caching).