Can anyone share with me links (besides the already given ones) that might be of use for obtaining a Ph.D. degree in one of the following countries: UK, Germany, Sweden, Denmark, Netherlands?

I forgot to mention, a PhD in biological sciences, especially microbiology or immunology

Germany: www. bioberufe.de

go to stellensuche,

then choose PROMOTION in the klassification box. Bioberufe is a website for people looking for jobs in biology and also for students looking for a PhD. Go through the offers and then write to the e-mail address privided there. PhD positions start all around the year in germany, not just in October like here. most are posted 2-3 months before thay begin. Many labs will speak english, especiallly if they are mixed.

For UK:
http://www.educationuk.org/
http://www.prospects.ac.uk/
http://www.hotcourses.com/
http://www.timesonline.co.uk/section/0,,8405,00.html
http://www.unofficial-guides.com/guides/