I recently installed SMS on my PS2, but since I have Win7 I couldn't use SMB shares.
However, all the tools I tried to keep either ps2client or radhost running wouldn't work properly or timeout at moments they shouldn't. So I coded up my own utility: ps2clmon.
It can also be used for other purposes, since you can configure it to use any device (hostname that responds to ping) and application, with arguments.
For those of you that still use SMS and might find this useful I decided to release it. More info & download here on my blog:
Omnicrash's Dev Blog » Blog Archive » Release: ps2clmon