Schlumberger/Axalto offers the e-gate adapter, an USB adapter for Schlumberger / Axalto Cryptoflex and Cyberflex cards.
The combination of Cryptoflex egate 32k with plug and e-gate token adapter is very well tested and works perfectly.
The Cyberflex 32k is currently not supported - you would need a javacard applet first and then OpenSC support for that applet.
Documentation for Cryptoflex cards are available for public download at [http://www.cryptoflex.com/].
Cards and adapter are directly sold by the manufacturer at [http://www.scmegastore.com/] (cards in packs of 5 only), five cards and adapters are sold for 150 US$.
Note: SCMegastore.com may no longer work, as it appears that Schlumberger sold or entirely split their card division off into Axalto. Try [http://www.market.axalto.com/].
Smart card bundle 0.3rc2 works fine on Windows XP (cryptoflex card, pkcs11-tool --test ...)