As promised, my Mirrors league is up and publicly accessible.
It will be a 20-team points-only league with 25-man rosters.

The premise of the league is utterly unique, so far as I know.
Normal metrics of success (passing touchdowns, rushing touchdowns, field goals, etc.) are punished, while normal metrics of failure (interceptions, fumbles, missed field goals, etc.) are rewarded.
This makes for a challenging league, to say the least.
Oddly, despite having an excellent TD:INT ratio, Aaron Rodgers was the highest point-getter in this league last year.
I'm still not sure how that happened.

This league has the most flexible rosters possible.
If someone wants to
carry 5 QBs, 5 RBs, 5 TEs, and 7 Ss, while another player wants to carry 10 TEs, 5 WRs, 4 LBs, and 3 CBs . . . that is totally acceptable.
The only fixed roster spot is that of the K.

Necessary information:

League ID#:
774061
League Name: Mirrors
Password: password1
Custom League URL: http://football.fantasysports.yahoo.com/league/mirrors
Draft Type: Live Draft
Draft Time: Sun Sep 6 8:30pm CDT

Come join us for an unusual time!

Tons of slots still available, guys.
Draft is in 44 minutes (8:30 CT)!

I won't be around for the draft but it sounds interesting enough to join.