Just as an FYI, I would say that the question is not relevant to InfoPathDev unless your company is moving to MOSS Enterprise. Do you know if it is going to be MOSS Enterprise or MOSS Standard? Enterprise includes Forms Services, which then allows you to do browser-enabled forms. MOSS Standard does not, but at least you will have a Shared Service Provider (SSP) that will expose some nice web services for you to use in your rich client InfoPath forms. When install MOSS, I'm not it's a valid question to ask which features you would want to turn on. For the farm, all of the "features" (these are actual things in MOSS that get activated/deactivated) are already activated at the web application level. It then depends on the type of site collection you create, because each template has its own INSTALLED and ACTIVATED feature set. Even after you create a site, you can go activate all the extra features that weren't activated by default.
So, in terms of things that you want to be toggled or configured (not features)and assuming you were asking the question in regards to InfoPath, I would recommend this:
- If it's MOSS Enterprise, be sure they go to Central Admin > App Mgmt > Configure InfoPath Forms Services > Check all the checkboxes that the company will allow. You need to look at them and decide on the one you want, or if they refuse to allow some, then you need to know it, becuse it could hamper your useof InfoPath
- Ensure it gets architected properly with the web apps inside an SSP and that all users have Read rights on the Personal Features permission of Personalization Services Permissions