Please continue this review. Many small sites have migrate up from SLD 5.0 and 5.5 environements and don't want to do a full domain migration.
Also please look into backup (with tapes) solution. Small sites with only one Exchagne server and a couple of other servers (DC file and print servers) don't want to go the DRM route, don't have second sites to replicate with.
Quick and dirty NTBACKUP was great for disaster recovery and comitting logs in in a crisis. Tapes are cheap over 10 or 15 years, and I have fairly frequently been able to restore old data from Exchange 5.5 or 2000 backups onto reconstructed systems (build a single server and restore your tape fromt he drive you kept and the old CDs)
What's your suggestion for getting back an e-mail deleted today in 8 years time? Buy a very expensive archive system? Small shops are not going to do that.
They are not going to put their data online either.
Beware of reducing basic functionality - small companies grow!