Just for completeness, if either end is new enough for auto-MDIX then it will work, the "active" end will adapt to the "not so smart" end. Auto-MDIX was patented in 2001 and widely used since. I doubt you could find a consumer device (laptop, pc, etc) without it built in the last 8 years.
If you do get a crossover cable I have three cautions for you:
1) Do not use it with any form of Power over Ethernet. One of two things may happen, it won't work, or it won't work and it will let the smoke genie out.
2) Mark the cable clearly, so when someone disconnects it in the future and tries to use it on something else they do not experience #1.
3) Most crossover cables do not work at all on Gigabit ports. Gigabit uses all four pairs, and crossovers only cross two of the four, resulting in serious confustication of the interface.