Pilsnerquest & kensanata: This is what I like about M20 more than anything else - the core rules are so small, they just beg to be added to and made your own. It makes a change to handling monolithic systems where even the slightest alteration is approached with trepidation. Mentioning no game systems by name, of course
The ideas for Renown, Prestige and Overwhelming an Opponent deserve entry into the
Microlite20 Macropedia , so that's where they're going.
We're in discussion right now about the HP cost for spell points. As it currently stands, to cast a spell you expend HP equal to double the Spell Level +1 (ie, 1/3/5/7/9, etc). That works well for lower-level gaming, but at higher levels is can be restrictive without some kind of magic item to fuel the spells. Put simply, Mages run out of HP too quickly.
A proposed solution for a higher-magic campaign is to make the HP cost double Spell level -1 so the progression becomes 0/1/3/5/7/9 - a shift to the right. Magi and Clerics could cast 3+MIND bonus 0-level spells per day for free. After that, they also cost 1HP. That brings the cost inline with the psionics PP cost from the SRD. Under this system, it's suggested to also ditch the cheaper cost for favoured spells.
I'm going to put this into the Macropedia as an optional rule for higher-magic games, and would appreciate your input.............
Over to you!