Not a motoblur fan, but i will say their corporate email and active sync programs are a little better than stock. For one, it allows you to sync "all" emails rather than just "one" month. Unfortunately, if you keep bluremail then you have to use blurcontacts and some other stuff.
The moto dialer for D2 is also not too bad. I think this can be used without blur, however.
I was using Fission 1.0 for awhile but went with Green 2.4.5 super clean va pro (with D2 email) instead just because of the email package.