I wasn't expecting that in the time frame anyone would have the time to work on more than one block. I never really settled on what would be the best way to go about this, but maybe we could put up a publicly-editable spreadsheet and people could start entering what blocks they're most interested in, or intendending to submit a proposal for; then others would be warned away from IP that already had three (or more) groups signed up. I think that would work better than people blindly submitting proposals without knowing if it's oversubscribed or undersubscribed.