Tweaking the prefs.ini configuration file is a very useful way of getting Eve to fully utilize your computer. If you haven't tweaked your prefs.ini yet, I strongly recommend you do so. It will improve the performance and overall feel drastically.
The prefs.ini file can be found by putting this into your URL bar: C:/Documents and Settings/INSERT YOUR COMPUTER USER NAME HERE/Local Settings/Application Data/CCP/EVE/settings
The ones that I recommend putting in are:
networkAdvanced which is already in it only needs to be changed from 0 to 1, this will allow EVE to utilize your connection better so you lag less and I even noticed a faster login speed.
advancedDevice=1 This will allow much higher resolutions as well as Anti-Aliasing and control over V-sync.
Things seemed to look better in general from what I saw by adding it.
buffersize= Set this to half of your physical RAM, this will REALLY improve performance if set correctly.
Here is where you can find more, including the ones I mentioned but these ones really aren't as important:
http://myeve.eve-online.com/ingameboard.asp?a=topic&threadID=108524