A little off topic: CVS features within ClearCase?

[Noel L Yap]

I'm planning to use ClearCase for a new project for various reasons (no flame
wars please).  However, I kind of like some things that CVS affords.  Has anyone
had any experience doing the following in ClearCase:
1. Having ClearCase do unreserved checkouts by default.
2. Having ClearCase infer which files to operate on (ie similar to plain vanilla
"cvs ci").
3. Having ClearCase do atomic operations (eg either all entities specified get
checked in or none of them do).

Thanks,
Noel