As widely expected David Cameron has announced that there won't be a referendum on the Lisbon Treaty now that it is in force. I always thought this was obvious because it would weaken him greatly if he lost and even if he won it would over shadow his government for at least a couple of years as he tries to negotiate a fresh arrangement.
I still think he should find some EU related topic to have a referendum on in order to satisfy the eurosceptic wing of the party* and the public.
* Within the Tory party probably everyone under the age of 55 is some kind of eurosceptic at least relative to 15 years ago, even if there is a divide between those who want to leave and those who simply want to pull back a bit. There is no longer a substantial body of opinion in favour of ever deeper union.