http://www.wacom-asia.com/press/img/20070515AP_bamboo.pdf Oddly enough they are being priced at ¥8,980, or about $75. It's not geared towards artists, so I would'nt expect any pressure sensitivity.
TAD is holding a sample-program which gives you access to their lectures etc. for 75$ for 5 days(November 7-11). http://theartdepartment.org/workshops-events/upcoming/explore2011
Up above the slider for the brush size is a slider that says "Focal Shift" -- change that from 0 to somewhere around 75 and see if that works better for you.
For everything you attempt to share about 75% of people will respect you for it and about 2% of people will learn it properly and apply it so go hog wild
Keep it at 75% in the big creases, and fade the the smaller stuff to 25%. Rite now the small cracks look as deep as the big stuff so it flattens out a bit.