Community server 2.0 now has an express edition (free) flavor too!!! so what though comes first (or should come) to your mind ?!?
This: Community Server Express Edition + Sql Server Express Edition = Rock ur Community!!!
& Cost = Zero (0) !!! (free) So wat are u waiting for ?!? ;)
Also a Special offer available till march 20th:
Buy a licence and get free upgrade to CS 2.0 Click here.