It looks like Link2Exchange has a $9.99 plan as well. I don't have any experience with hosted BES companies, but I have heard that GoDaddy has had reliability problems lately. You need to compare not just prices, but the features you get for the price and how well each solution fits your needs.
When you use a hosted exchange like link2exchange, does that allow you to access your outlook calendar from any computer like I do with google or funambol.
Thanks,
Ken
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Phones Owned: Nokia 6200; Nokia 6126 2ea; 8700g; 8900; Carrier-Cincinnati Bell: Future Bold Owner
Another really good one is MailStreet. I am not using their hosted BES anymore but up until last month when I got a Nexus One they were perfect. I still use their hosted exchange without BES.