Apple's new iPad may be getting all the attention, but it's not the only noteworthy tablet hitting the market this year. In fact, a slew of other companies are rolling out offerings to catch the tablet wave. Here are four to watch.

1. Notion Ink Adam

With the press of a button, the 1.7-pound Adam switches from low-power e-paper to full color. Unlike the iPad, the Adam, due in June, has a camera, an HDMI port, and a memory card slot.
COST: Unavailable at presstime; Notion Ink says it will be competitive with the iPad, which starts at $499.

2. Lenovo Ideapad S10-3T

This 3-pound tablet has a physical keyboard and a 10-inch display that swivels to switch from laptop to tablet. Other features include Quick Start, for going online without booting into Windows 7, and DirectShare, for syncing files. A charge lasts seven hours, compared with 10 on the iPad.
COST: $499

3. JooJoo

The JooJoo's 12.1-inch screen is great for streaming high-definition video. The 2.4-pound tablet, which has shortcuts to Twitter, Hulu, and Facebook, is all about the Web; it promises to get users online in nine seconds. Unlike the iPad, it has a webcam -- but it has only five hours of battery life.
COST: $499

4. Entourage Edge

A so-called dualbook, the eDGe has two screens: a 9.7-inch eInk display for reading books and a 10.1-inch LCD for surfing the Web. The 3-pound device has a camera and runs on Google Android, giving users access to apps. It lasts 16 hours in eReader mode and six hours in color.
COST: $499

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