On the modules list (modules AT perl.org) we tell people that Net:: is for network protocol implementations, such as FTP, SSH, and so on. It is cluttered with other things, but don't add to the clutter because someone else did. :)

Things that use a particular protocol without implementing the networking details themselves belong in another namespace. Webservices happen over HTTP, but you aren't implementing the network part of that: you're just putting the right things in the message body (or header).

I'd like to see more top-level namespaces myself. The Webservices::* thing has always been pretty ugly to me. eBay::* or Amazon::* seem like better names. People don't care so much about how they do it as what they do. They are more likely to think "I need to interact with eBay" rather than "I want to use a webservice". However, we've had at least one company that complained about top-level names: when you take on the top-level namespace, it appears to be more "official" or "supported" or whatever.

But, as David says, people are going to search for "eBay", so they'll find it as long as you have that string in there.

Good luck ;)