So, IMS is the first one who has uploaded the answer key of CAT 2008 (according to my online track). So I am giving you the link of the page where you will find the answer key. Please click the image to go to the answer key page. Best of luck for your score.
CAT 2008 [...]

Every year score varies according to the key of different institutes, this will not change but your effort of collecting the key from all institutes will reduce now as pagalguy has launched Scorecard, One online destination to check your score according to the keys provided by different institutes.
Find out how you fared in the CAT. [...]

A very nice presentation from IMS. It is giving some tips about what to do in last 10 days, but now its late for that; still it has some motivating tips for the D-Day. Do take a look and sorry for sharing it late. Best of Luck for the D-day. You can also download the [...]

There are various sites where you
will find the solutions of CAT 2008 after the exam (of-course), but if you
haven’t join any coaching institute and want to chat with experts about your
chances then you can go to TIME site and talk to their experts. Itinerary is as
follows:

First Impressions and Score [...]

Summary:
1) Practice your formulae list daily.
2) Don’t strategise now.
3) Give mocks at 10:30 a.m.
4) Have a bash on 15th Nov, 08 (but no alcohol please ).
It feels good when I watch such videos which say don’t study too much now.