I am having the same problem. 7 disconnects today, 4 in the span of 10 mins.

1) User Environment
1. – Operating System? Win7 x64
2. - Antivirus program? AvG deactivated
3. – Internet Service Provider? Verizon
2) Exact Error Message No Error Displayed
3) Frequency of 30002 Error?
4) What area were you in when the error occurred? Varies from Ul'dah to Gridania
5) What were you doing when the error occurred? Gear swap and inventory navigation
6) Were you in a party at the time the error occurred? no
7) Estimate number of characters that were near you at time of error? 1-10
8) Were you able to log back into FFXIV after the error? yes