I contributed to your ItT Data plans Wiki entry, but, frankly, there are about 50 different data plans available in Germany and they change almost every month. There are 4 networks and further resellers, you can different plans depending wether they are tied to a single device or not, tied to the operator portal, usable only around your home, all over Germany or include usage in foreign countries. There are plans by byte, by minute, with and without monthly charge, with and (rarely) without minimal duration... If I put them all (which I am not going to do, understandably), the wiki will more than double...
24/7 Internet connectivity a small device has been offered here for at least 3 years, but it depends what you call "Internet connectivity".
BTW: even Symbian phones allow 24/7 Internet connectivity. My E51 is configured to check my e-mail regularly, and allows sip as well. It has a quite usable browser. I use it to listen to Internet radio stations, etc... Internet connectivity was not the "revolutionary" part of the 770, the fact that it ran linux and thus was an open device was.
Oh..., yes. Certainly. And have it reread by an army of lawyers if you can...
There are ways to work around any ban on the Internet. I sure know... (In practice just trying non standard ports is usually sufficient.)