It's your choice whether to take the plunge now or give it a little time. I was planning to upgrade too but a little expense (trip to Brazil) will slash my budget. Considering what's coming up both from AMD and Intel, it's good that I wasn't able to upgrade right away. Intel is coming up with new chipsets and a new manufacturing process (45nm). After these are released, you'll be able to buy 65nm technology cheaper. AMD, on the other hand, will come with a complete upgrade to their processor architecture (not unlike the one that Intel had with Core 2) and will contribute to a price drop in their gear as well.
Taken from Wikipedia:
"Penryn
The successor to the Merom core currently used for the Core 2 Duo T5000/T7000 series mobile processors, code-named Penryn, will debut the 45 nanometer process that will also be used for the Conroe sequel, Wolfdale (see below). Many details about Penryn appeared at the April 2007 Intel Developer Forum. Its successor is expected to be Nehalem.
Important advances[27] include the addition of new instructions (including SSE4, also known as Penryn New Instructions) and new fabrication materials (most significantly a hafnium-based dielectric).
Penryn is intended to be paired with a new chipset, Bearlake[28], which will include an increase in bus speed (connection to the northbridge, etc.) for certain models to 1333 MT/s and will include support for DDR3 SDRAM; Intel believes [29] that DDR3 is particularly useful in the power- and heat-constrained environments within mobile equipment.
Penryn will also be released in a quad-core version for desktop replacement notebooks."
http://en.wikipedia.org/wiki/AMD_K10
If you really need a few tech tips, you can try posting your request on the Tomshardware forums (the CPU one). They helped me cobble together a system that otherwise would be much more expensive.
