Don't want to hijack this thread, so anyone having trouble finding MinFreeManager in the store or wanting to give feedback etc should hop over to my blog post about it where you can find the APK for download and leave comments....
(sorry, just joined to can't leave external links yet...)
www dustypixels com/blog/2010/01/30/android-app-minfreemanager/
Yeah, it is 1.6+ I'm afraid, it was just created on a whim in one night and I started building it for 2.1 because that's what I'm on, didn't give it much thought. I later tried stepping down the SDK's but it wouldn't build on 1.5, not sure why yet. As you can see on the pic on my blog post, it was 6.30am by then so I just put it up as is. Sorry about that for anyone on 1.5, will take another look when I get a chance.