Most tablets introduced in recent months have been relatively powerful and inherently expensive, but Enso has rolled out wallet-friendly alternative. The Android 1.6-based zenPad starts at a paltry $155, and has modest but seemingly adequate specs for basic use.
The zenPad features a five-inch, 800x480 LED-backlit screen, a 667MHz Samsung 6410 processor, 256MB of DDR RAM, 8GB of storage via microSD (supports up to 32GB), built-in Wi-Fi, and promises six hours of battery life. For $25 the slate can be outfitted with GPS, and another $35 will get you an external 3G dongle.
Granted, you won't be watching Avatar in HD, but for mobile Web browsing, emailing, or accessing documents, photos, and music, it's a low-cost solution. The zenPad is packed with earbuds as well as a stylus, and it's available to penny-pinchers everywhere through Enso's site or eBay (which seems to be a bit cheaper).