when you look back at when 3.x was released. it took them a few weeks to jailbreak that and there were plenty of people crying and whining for them to work faster. you have to remember people do this as a hobby, don't get paid, don't ask or want money for it, and in some countries (like the US) it's illegal to be conducting this kind of work (thank the DCMA for that).
for those interested in following here are the two main sites for people working on jailbreak efforts
http://blog.iphone-dev.org/ - dev team blog
http://blackra1n.com/ - geohot's blackweather site