From an email:
just a quick announcement: ruby user group berlin has decided to organize the obligatory reject conf for rails conf europe in september.
when? tuesday, 2007-09-18, 21:00
where? secret place (i.e. we have not found the perfect location yet)slightly different rules this time. anybody can talk about anything, but we ask you to present your talk as a micropresentation - that is: 15 slides, 20 seconds each, with a countdown which automatically brings up the next slide.
sounds weird, but i have seen it at reboot in copenhagen and it works really really well:
I give them full permission to use my glorious artwork. :P

if you want to take part, watch this google group for further details:
http://groups.google.com/group/rejectconf
@ryan: thanks for reposting the announcement. lets see where we can use the artwork - tshirts maybe? ;)