Beside oneself with excitement

• All keyed up
• Bright-eyed
• Eagerly wide-eyed
• Stoked, perhaps
• Wide-eyed and open-mouthed
• Buzzing with excitement
• Quite excited

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Agog \A*gog"\, a. & adv. [Cf. F. gogue fun, perhaps of Celtic origin.] In eager desire; eager; astir. All agog to dash through thick and thin. --Cowper.

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
adjective EXAMPLES FROM CORPUS ▪ Everyone was agog to hear what on earth comrade Khrushchev would say. ▪ However, Burke's outstanding performance had boxing enthusiasts agog with excitement and wanting more. ▪ Naturally, when the seedlings are planted out, ...

Wikipedia Word definitions in Wikipedia