I got my new Canon XSi last night and have been thinking about ordering an [ame="http://www.amazon.com/Eye-Fi-Wireless-Secure-Digital-EYE-FI-2HM/dp/B001AD0TGQ/ref=pd_cp_misc_0?pf_rd_p=413863501&pf_rd_s=center-41&pf_rd_t=201&pf_rd_i=B0012BOVDS&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=0GJVAV88858EPXRB6P54"]Eye-Fi card[/ame]. I'm sure you guys have discussed it, but a search didn't help. Do they work as advertised? Is it worth $65 for a 2Gb card? How badly is the extra drain on the battery? Any help is appreciated before (or whether) I pull the trigger.