Review bookmark services

I asked a lot of people what bookmark services are they using. Most of them are:

• FireFox Speed Dial Plugin
• Opera (has a speed dial)
• iGoogle
• and I made Fav20 – why ? read bellow

All of them have pluses and minuses.

FireFox SpeedDial Plugin
+highly customizable, -browser dependable, -requires instalation

Opera
–limited(9 sites), -browser dependable, -requires instalation

iGoogle
+categories,+rss,-registration

Fav20
+no install and no registration required

Everybody can use any of the bookmark services above, most tech people will use FireFox plugin, but avarage user can find fav20 very simple to use and may love it, specialy now that he can move all his local saved pages to his account to access from any computer.

What bookmark service do you use and why ?