Things have been pretty quiet over a Microsoft regarding any upcoming Zune refreshes, but that hasn't stopped the rumor mill from bustling with activity. And why not, given that Apple just recently launched its newest iPod touch with a built-in camera and FaceTime support.

Rumors of an upcoming Zune player began earlier this month when ZDNet's Mary Jo Foley said that one of her sources "who has been a solid tipster on Microsoft-consumerish things in the past" told her that the Redmond giant plans to release at least one more Zune HD media player. The tipster claimed it would probably debut in 2011 and might come equipped with an ARM processor, along with a bunch of UI changes from the Windows Phone 7 team.

More recently, Microsoft put up a job posting looking for a Hardware Engineer to help with "next generation of portable entertainment and communication devices." The job is for a senior mechanical engineer in Microsoft's Portable Entertainment Group, the same team that designed last year's Zune HD.

Whether or not there's anything to these rumors, or whether Microsoft simply plans to let the Zune line fade away and instead focus on porting Zune features into its Windows Phone 7 devices remains to be seen.

With Easter a little less than a week away, it looks like Microsoft is prepping a new Zune HD player just in time for the holiday, even if you weren't supposed to know about it.

On the Zune's homepage, Microsoft's web monkeys have added a listing for a Zune HD 64. Click on the link, however, and you won't get very far - it brings up a "page not found" error rather than a new product page for a Zune HD sporting twice the amount of storage as the current flagship model.

If we had to guess, we'd say the link will go live fairly soon, though don't expect any hardware changes beyond the bump in capacity. That's not a bad thing, as the Zune HD comes comprised of an Nvidia Tegra chipset, 3.3-inch AMOLED capacitive touchscreen, and a pretty slick UI.

Since there hasn't been an official announcement yet, there's obviously no word on pricing. As a point of reference, however, the 32GB Zune HD runs $240.