Do I need to pay to use the software? I went to the signup page to enter the invitation code but it asked for a tax and credit card info, I don't even have a credit card.
Yes. Same here. Had to use credit card for service that "so far" is not working (unable to connect).

Sat Apr 12 05:01:27 2008 OpenVPN 2.1_rc4 Win32-MinGW [SSL] [LZO2] built on Apr 25 2007
Sat Apr 12 05:02:12 2008 LZO compression initialized
Sat Apr 12 05:02:12 2008 Control Channel MTU parms [ L:1544 D:140 EF:40 EB:0 ET:0 EL:0 ]
Sat Apr 12 05:02:12 2008 Data Channel MTU parms [ L:1544 D:1450 EF:44 EB:135 ET:0 EL:0 AF:3/1 ]
Sat Apr 12 05:02:12 2008 Local Options hash (VER=V4): '69109d17'
Sat Apr 12 05:02:12 2008 Expected Remote Options hash (VER=V4): 'c0103fa8'
Sat Apr 12 05:02:12 2008 Attempting to establish TCP connection with 75.127.65.162:443
Sat Apr 12 05:02:12 2008 TCP connection established with 75.127.65.162:443
Sat Apr 12 05:02:12 2008 Socket Buffers: R=[8192->8192] S=[8192->8192]
Sat Apr 12 05:02:12 2008 TCPv4_CLIENT link local: [undef]
Sat Apr 12 05:02:12 2008 TCPv4_CLIENT link remote: 75.127.65.162:443
Sat Apr 12 05:02:12 2008 TLS: Initial packet from 75.127.65.162:443, sid=5a1e7de3 faf3bcb8
Sat Apr 12 05:02:13 2008 VERIFY OK: depth=1, /C=UA/ST=NA/L=Odessa/O=OpenVPN-TEST/OU=eg/CN=testvpn/emailAddress=root[ at ]localhost
Sat Apr 12 05:02:13 2008 VERIFY OK: nsCertType=SERVER
Sat Apr 12 05:02:13 2008 VERIFY X509NAME OK: /C=UA/ST=NA/O=OpenVPN-TEST/OU=eg/CN=testvpn/emailAddress=root[ at ]localhost
Sat Apr 12 05:02:13 2008 VERIFY OK: depth=0, /C=UA/ST=NA/O=OpenVPN-TEST/OU=eg/CN=testvpn/emailAddress=root[ at ]localhost
Sat Apr 12 05:02:40 2008 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Sat Apr 12 05:02:40 2008 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Sat Apr 12 05:02:40 2008 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Sat Apr 12 05:02:40 2008 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Sat Apr 12 05:02:40 2008 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA
Sat Apr 12 05:02:40 2008 [testvpn] Peer Connection Initiated with 75.127.65.162:443
Sat Apr 12 05:02:42 2008 SENT CONTROL [testvpn]: 'PUSH_REQUEST' (status=1)
Sat Apr 12 05:02:42 2008 AUTH: Received AUTH_FAILED control message
Sat Apr 12 05:02:42 2008 TCP/UDP: Closing socket
Sat Apr 12 05:02:42 2008 SIGTERM[soft,auth-failure] received, process exiting