I like Abba! In my musical history, they stand out as being the first of the "synthesizer-based" groups that I enjoyed. They paved the way for many other groups & their music stands up very well today, as evidenced by the popular musical "Mama Mia!"
I just finished watching the video to "Hovas Vittne" (follow the link at JoeyMuppet's blog site). Even though I couldn't understand the language, it was great! (Where's the Chef when we need him?)
The point is that their music is entertaining no matter what the language. So JoeyMuppet, thanks for sharing these videos with us!
The "Abba Gold" and "More Abba Gold" CDs give you a good collection of their best-known works. Also, there's a great documentary that I've seen on "Biography" of the group. It gives a history of the four which goes all the way up to (just about) present day.
Plus, I kind of like Anni-Frid. . .
http://abba-fanclub.blogspot.com/2007/05/hovas-vittne.html