Short answer; yes. We are gunning for Steam and Desura, and I believe their platforms support a less restrictive DRM system.
The game will also feature solo play, and will not require a web connection. We're going to be introducing network play possible through LAN, and using a server module that will be open source.
To answer your question in full, we will have to research our options. We do want our game to be flexible to the user, and we don't feel like playing "network nanny" with cumbersome authentication technology. We want our players to just click the game, and go! :)