There has been a Belgian suicide bomber in Iraq, I think he may have been a convert as well.
http://news.bbc.co.uk/1/hi/world/europe/4488642.stm
The Hamburg cell proved that people from Germany are prepaired to kill themselves. I personaly feel it is a matter of resources. There are so few suicide bombings that indivual personality takes a bigger role than national politics. Al Queada is not SMERSH, it is a operation that lives on the edge with only so many intelligent and capable people so they have to be very careful where they invest there resources. The UKs foriegn policy closeness with the US, the domestic unease towards that closeness means that after Spain and along with Italy they are the two most vaulnrable members of the Coalition. It would be interesting to see one day, what measure of resources, especialy the most valuable kind: human, AQ has focussed on the UK. al Zwahiri seems to have taken a personal interest in getting the 7/7 and the failed follow up operation of the ground and running. If al Queada is focusing its best western operatives on the UK then it stands to reason they will pick up on whatever is available in the UK. They may feel strongly the UK is the most likely member of the coalition to crack under a terror onslaught.
French foreign policy in Algeria is pretty hostile to Islamism. They have the foriegn policy motive, especialy for young Algerians. Id be willing to bet France has a bigger problem of radicalising youth, just they are not getting the focus from AQ.
Whats more the natural connection to French Islamists is Algeria. The Algerian government has crushed an Islamist uprising and probibly has pretty good tabs on the dissadent groups there now, who they can pass on to there very close alliance with France.
In Pakistan things are far more complex with many within ISI having sympathies towards al Queada and often some personal contacts. The Taliban was and ISI proxy, and inderectly a Saudi one. This dynamic may also have a role in the Pakistan based al Queada feeling that there is a blind spot here to be exploited.
I also get the sence that many young white far left British are every bit as incenced at the UK government, and if the resistance was more open and less focused on the necessity of martydom, they would join. (i.e. happy to help planting bombs aginst government and army targets.) I am not talking about 100 000 white youths, perhaps no more than a 1000 or so. The sort who are also involved in the most extream animal rights protests.
It is the exclusivity of al Queada (sunni muslims only) and the personal cost (you gotta die doing it) that excludes this source of radicals.
I do not know the demographics and so on of other European nations but I will be willing to bet that UK muslims are amoung those with the highest ratio of middle class sucess stories as well. One of the profiles of the suicide bombers is that they have gone from being very secular in life style to embrassing Islam. People comming from succesfull families (not wealthy just settled) who rediscover there religion and with many families being relativly well off, there is a large pool of them. (does that make sence).
Oh well.