well...welcome.

- there are no bandwidth restrictions for free users. no limitations has sort of been zooomr's thing. except file size restriction is the same for all users...which i believe is 15MB.

- i'm not a mac user. zooomr doesn't maintain a transfer tool. but, i've seen in the past that some zooomr users have developed third party scripts, add-ons, and such [Ping, Bluemonki, and Prophead are the ones that come to mind]. sorry i can't be more help.

this may help:
http://www.zooomr.com/groups/help/discuss/2151/

- FAQ...zooomr support is a mess. there are several groups, each with multiple threads. there are also several links in the footer below (next to "help" and "zooomr", as well. and there this old out-of-date site but you may find this helpful:
http://zooomr.wiki.zoho.com/HomePage.html

good luck.