Thanks for the replies guys. I realise it's an unusual question, made tricker to answer by the lack of detail on my part. This is some great input. We've already worked on vinyl wall decals, full digitally painted murals (those were so fun), branded mugs, pens, coasters, t-shirts, hoodies and a swag box for new starters that includes branded playing cards and headphones (non-branded, though the Beats logo looks a bit like the first letter in ours). Most of this was all done last year (or a few years before) and I had recently been tasked with expanding the effort even further than we already have.
My thinking right now is to revisit the clothing. So far it's mainly baseball shirts with the logo on, and while the staff seem to like them, the boss finds them shall we say "uninspired". I'm thinking of smartening it up with a high quality polo shirt and embroidered logo. Beyond that, maybe branded USB hubs... team-specific branding...
There's a lot that's still in the air, so I can probably call this enquiry closed for now. But I want to thank everyone for their input, and Scotty I might be after a link to that company you work with if they have a lot of products to offer... /hint