Yes, Intelli Poker is a german Pokersite which is related to Pokerstars. It not only has a poker forum, but also a poker school with many articles written by pro's. Furthermore there are also blogs available to read of certain german and international pro's...quite interesting all in all.
Moreover they also host their own TV Show called "Pokertoday" 2 times a week, where they often report about the latest Live Events from all over the world. For example they were at this years
wsop and reported about every single day of it (who won the bracelets & what stuff happened etc.)
Why so many people have the intelli avatar on the tables is, because you get 4 fpp each day for wearing them at Pokerstars, even if you don't play. The 4 fpp's are for bronze star members, if you have a higher level such as silver or gold star, you get even more fpp's for wearing that avatar. Furthermore you also get fpp's there for writing posts or rate blog entries etc. So basically it's very easy to get some fpp's there, but it's only for german speaking players yet, sorry.
Oh, yea and they also host freerolls as mentioned already plus have some other challenges from time to time such as "design your own
chips and the best ones get in production + win some prize money" etc.
Quite a cool site and basically every german is a member there who also plays on pokerstars.
Hope that helps.