Hear! Hear! We use Pst's and ost's successfully in combination. I am not recommending them as an alternative to a bit of space on the exchange server (ours is a 20 meg limit) but some users will abuse unlimited space. (we have one user who fills up her 20 meg limit in 6 hours!!!!)
While you do have to be carefully, I have found that with proper training of the users, that both psts and osts can be used. BTW: Sometimes File server pace is cheaper the exchange server space. The IT dept. pays for the Exchange server, but individual deptarments buy space on the file server. Liz List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
