Saviour wrote on 26.05.09 at 23:15:29:

My best score today was 259893 Points.

My best so far is 410000(ish), wave 5, but Xerus holds the record at 800000!

However, the scoring system is next on the list of things to revise, so that will all change in the near future...  At the moment certain pickups are worth big bonuses.  Keep an eye on the score when you collect things to see if you can work out what pays off best ;)