I've been given a Verizon PC5750 air card that fits my Dell Inspiron 6000 laptop by my company so that they no longer have to pay for my home dsl service. Does anyone know if I can get a converter/adapter that will let me plug the air car into my desk top and save the $ of keeping my dsl service?

Thanks, Dan

Absolutely!

Here are many for you to choose from.

Desktop Computer Card Adapter - Compare Prices, Reviews and Buy at NexTag - Price - Review

Actually, I would go a different route. There are routers that will use such a card as the WAN input so you can then share it.

Here's one example:
D-Link Announces New Wireless 3G Router For Mobile Broadband Access Over High Speed Cellular Networks

Or check others:
mobile broadband router - Google Search